Let's discuss assets, goods and services which price is more than $200 net. Inexpensive goods have already been discussed on this forum. For now, we will not take into account the fact that the use of crypto may be prohibited in one country or another. Let's find how we are ready to negotiate, and what tools we do need in order the buyer could find the seller.
I'd say that the best way to find buyers who deal in Bitcoin is through local Bitcoin/crypto focused groups. Be careful about the laws in your country. As far as I know the sales of items above a certain value need to be formally closed with documents as proof (bill, contract, etc.). That might also be in your benefit as in case of a control from the fiscal agency you generally need to prove income (this mostly applies if you're doing a lot of transactions)