If you are buying a millipede, the key questions are the ones that tell you exactly what species it is, how it has been kept and whether it suits your setup. Those answers matter because millipedes vary in size, behaviour, visibility and how easily they settle, so a seller who can give clear details is much more useful than one who only gives a name and price.

If you are still at the early planning stage, our Millipede Beginner & Buyer Guides and How to Start Keeping Millipedes are a useful place to build the basics first.

What should you ask a millipede seller?

Before you focus on colour, size or whether a listing looks active, ask what the animal actually is and what it has been living in. That gives you a much better idea of whether it is suitable for your enclosure and your expectations.

• What is the scientific name? Common names can be vague, and some trade names cover more than one species or form. The scientific name is the clearest way to confirm identity and compare husbandry, adult size and behaviour.
• Is it captive-bred or wild-caught? Captive-bred animals usually have a more predictable background, while wild-caught millipedes may be less certain in terms of history. If you want to compare the two in more detail, see Captive-Bred vs Wild-Caught Millipedes.
• What life stage is it? Juveniles, subadults and adults can differ in size, visibility and how much growing they still have to do. This matters if you are planning enclosure space or want a better idea of what to expect.
• How has it been housed and fed? Ask what substrate, moisture level and food it is currently used to. A millipede kept on deep organic substrate with leaf litter and rotting wood may react better if you can match those conditions at first.
• Is locality information known? If the seller knows the locality, it may help confirm identity and give more context about the animal, although it should be treated as supporting information rather than a guarantee.
• How long has the seller had it? This is especially useful for wild-caught animals. A period of time in captivity can make the millipede easier to assess and gives the seller more chance to observe feeding and condition.

If you are unsure how to judge an advert, it can help to compare the seller's answers with our guide on What Should You Check Before Buying a Pet Millipede? and our guide on How to Tell if a Millipede for Sale Looks Healthy.

What to check before you buy

The best seller for you is usually the one who can answer practical questions clearly, not the one with the most impressive photo. If you want a millipede that is easier to settle and whose background is more predictable, captive-bred is often the more straightforward choice. If you are more interested in unusual species or locality forms, a wild-caught animal may be more appealing, but its earlier history is less certain and acclimation matters more.

If you want to see your millipede more often, ask about adult size and typical activity. Some species stay fairly hidden, while others are more likely to be seen once settled. No millipede is a guaranteed display animal, so it is better to choose based on species, size and suitability than on appearance alone.

Large species can be impressive, but they usually need more space and a deeper setup. Smaller species can be easier to house, but may be less obvious in the enclosure. For a first purchase, it is usually smarter to choose the type of animal you want to keep rather than simply the most striking one.

What to expect afterwards

Once you have bought a millipede, expect a settling-in period. Even healthy animals may become much less visible after moving to a new enclosure and can spend a lot of time below the substrate at first. That is often normal.

Have the enclosure fully prepared before the animal arrives, so you can keep the move calm and avoid unnecessary disturbance. If you know what the seller has been using, you can keep conditions familiar at the start and adjust gradually if needed.

A millipede's behaviour in transit or immediately after purchase may not reflect how it will behave once settled. An animal that looks active in a seller's holding tank may become more secretive in your enclosure, and a species that hides at first may become more visible later.

For more practical preparation advice, visit our How to Start Keeping Millipedes guide.

Quick buyer checklist

• Ask for the scientific name.
• Confirm whether it is captive-bred or wild-caught.
• Check the life stage.
• Ask what substrate, moisture and feeding it is currently used to.
• Ask whether locality information is known.
• Find out how long the seller has had it.

Clear answers to these questions make it much easier to choose a millipede that suits your setup and to prepare for a smoother start.