What you need to do is research the prices here in Canada. First, see what other private breeders are selling at, and then your local stores, there will be a difference in the retail prices. Mark up can be anywhere from 25%(which is low, and don't go any lower than that), to 75%, depending on current market value and the local or species being sold. A store could pay $200 for a lizard from their regular supplier, and then maybe only $150 from you, they will still mark it up to the current going price(sometimes, but not always, will they hold a sale if they get a good price, just means more money for them).
So if a store is selling an Ambilobe Panther for $275, take that price and divide by 1.50(150%), = $183.33, would be about what they paid cost(wholesale) for it. Sounds about right to me. At my local stores, I see female panthers retail for $250-300 and males $350-450. Then I look at private breeders that sell females for $150-200, and males $250-350.
Now, to compete with those prices, go to the store with a price you would like to sell for(and also know your bottom dollar so you can haggle). If they don't like your price, ask to see their price list, and only once you see what they are paying, say you will beat that price by 15% for example. Keep in mind that it's not just the 15% they are saving, they are not paying taxes, shipping costs, or import charges if they apply. Makes the price even better for them.
Another thing to keep in mind is the cost to feed them until they are ready for sale, this needs to be incorporated into your asking price. And yes, you need to make a profit on the food as well. If food costs $15 for each lizard, per month, mark that up 25%. So now food costs $18.75 per month. If you are selling them at 3 months old, food costs $56.25. You sell your lizard for $150, you are now making $93.75 profit. That profit reflects your time and care and running around to make deliveries. Are you happy with that pay out?
Businesses also require receipts. You can find a receipt book in any office supply section. You can operate your own business under your name, as long as sales are under $10K a year. This is where that question comes in at tax return time, "Have you had any other income through out the year." You should be claiming the extra income to pay tax on it. If a company you sold to ends up being audited, and they find your receipt, they will check in to see if you claimed that income. If you haven't, then you will be audited as well, and will need to pay the tax on the amount of sales you made(private sales don't really require a receipt...but I didn't tell you that lol).
Hopefully that helps! Have fun selling

If you want to ship I may be interested in a couple females
