Like most things these days, it all comes down to information access and basic economics.
Getting a “good deal” is often dependent on what economists refer to as “imperfect information” in a given marketplace. Fancy way of saying one party in the transaction (i.e either the buyer OR the seller) knows more than the other about what the going price of something currently is.
Time was that good pricing information was only available from paid subscription services catering to specific business abd industry segments. Similar to the multi-listing services used by realtors and rental agencies. Pawn shops had networked pricing database very early on as well. Notice how finding super deals on music gear in pawnshops has dried up compared to what you could find 10-20 years ago?
Here’s what happened: the Internet.
There’s a huge amount of price information readily available to anyone who bothers to look. And it’s also free. So comparison price shopping - and price setting - has drastically cut down on the number of totally clueless buyers and sellers out there.
As a result, the opportunity to get someone to pay more than the average going price of something -or- the opportunity to find someone selling something for significantly less (as in: getting a “really good deal” or a “steal”) is pretty much becoming a thing of the past. Because everyone now has access to the same “good” information to bargain from.
Reverb makes it even easier to check because they provide price trend information on their website.
This is what’s called economic “efficiency” where the bid price and the asking price are essentially equal. It’s extremely easy to buy and sell when the buyer and seller are in close to immediate agreement about the price. And as long as goods and services (and money) flow freely through the system it’s good (“efficient”) for the economy - even if it’s not so good for deal hunters anymore.