Who knows, e-x-a-c-t-l-y? The seller should know. Call the outfit & tell them you need to know what's the story with this particular amp. Exactly. Ask them to find out for you. Does it carry the same warranty as new? If you think you may want it, be persistent & insistent.
I called a online store about a B stock, price reduced Ampeg PF800. When I asked what made it B stock, rep took a few seconds then said, "looks like it's a customer return." Made it seem like his PC screen was able to tell him this info. Not sure if that's even possible. So I took a chance on this nicely priced unit, 90 warranty. The PF800 ran great for about 5 gigs; on the 6th gig it failed me by shutting down after 4 sets of music that day.
Called Ampeg warranty, they offered to look it over if I shipped it to them. But I was weary of even getting this amp serviced. So I returned it for full refund. I really liked what this amp gave me for 5 gigs, so a few weeks later I ordered a brand new PF800. Even Ampeg rep said back before, "with a new unit you get 2 yr warranty for the extra cost so that's a better deal."
Well darn, this new unit shut down twice at two different gigs on a Fri and Sat. after a couple other gigs where it ran fine. Some say was user error, maybe, not sure as I only used it with no extreme EQ or volume settings. I just wondered afterwards if they actually make any repairs to some of this gear that's sent back. I saw what I think was that B stock, PF800 back on sale just days after I returned it at like $10 more. Maybe it was a different unit??
So I went with a brand new ri-V4B from Sweetwater. It's not gotten a lot of use, maybe 5 gigs, but so far so nice. I too think it might be a good thing to order new amps for the warranty. Although I've had good luck buying other B stock, open box, etc, gear in the past. And always had good luck with used amp purchases/trades here on TB. OP, Just try to do your homework when looking.
And finally to OP, if you're just starting out, maybe a brand new combo amp would be best for you.
Last edited: