$0.02....
Ebay is still the safest place to buy/sell online. There are ways to get scammed, but using Paypal exclusively will eliminate most of the would-be attackers. You have a safety net with ebay/Paypal, as both a buyer and a seller, that you don't have elsewhere, including Reverb (don't ask

) or any of the various forum classifieds. Not to mention access to the biggest market.
Even so,
buying safely off ebay is so easy that a chimp could do it, but
selling safely on ebay requires some effort. Tbh, most of the ebay listings I see are rife with potential problems because the sellers don't bother to disclose enough info to protect against fickle or dishonest buyers.
For ripoff sellers, ebay is nowhere near as attractive for them as it was years ago. As it stands now, Reverb is a bit like the old ebay, where dishonest sellers can get away misrepresenting items without much consequence. Reverb is still kinda new, but over time the crooked sellers will realize the opportunity that Reverb presents.