For $10 you can get one month's access to the Audiogon Blue Book which will give you historical sale prices on gear they've listed. This will help you hone in on typical selling prices over time. Can't guarantee they will have exactly the pieces you are selling, but as one of, if not the largest sites for used audio gear, it's a useful guide. In my very uninformed opinion, VR33s should fetch around $2k, depending on condition, but that quote is worth exactly what you paid for it. For $10 you can get a more reliable estimate. Good luck.