There's zero reason to buy a World of Warcraft account, you're not going to get anything for it.

>>736482957
Sell it directly to someone who wants what youre selling
Those account sites will probably rob you

>>736482987
Where could I go to see how much I could get for it?

>>736483053
OK, thank you. +1 vote for direct sale.

There's no market, certainly not if it's not Hand of A'dal-Death's Demise-Server first Lich King, multiglad, etc, etc, with 50000 achievement points and a thousand mounts and whatever. Characters alone, unless they have top-tier mythic raid gear ( I'm guessing in neo-WoW the best gear is from mythic raids, anyway), are basically worthless.

But while I haven't sold accounts (private server ones) for a better part of a decade so I don't know what websites might be involved, there's two things you should pay attention to doing the following:
1) trades involve an escrow arrangement in which the seller gives some trusted third party (verified by reviews on sites like Trustpilot) the account information, the buyer gives them the payment (plus the escrow fee), the escrow checks the account is as promised and if it checks out, changes the account information and hands it over to the buyer, and then gives the payment to the seller
2) the trade includes the e-mail account tied to the game account, so the seller can't just use account recovery

If both of these criteria aren't met, chances are you are being scammed: legitimate buyers wouldn't do the deal in a way that is risky to them, so legitimate buyers wouldn't accept to a deal that doesn't involve these safety measures, so whoever suggests a deal that doesn't, isn't a legitimate buyer (ie. they are a scammer). Unless of course you personally know and trust the buyer, but in that case you wouldn't be asking for suggestions.