Hi, I'm looking to change my old bass and I have these two options at the exact same price. On one side I have a second-hand BTB 550, made in Korea, 2007. It looks like a really nice bass though I have yet to play it. On the other side I have a new SR300. The exact same price as the above. Made in Indonesia or China I think I'm not sure. Both basses will be an improvement for me, but I want to choose what's best. I can get both options at the same price so that's my concern! One is second-hand and the other one is new. I have played de SR300 and liked it quite a lot. I have yet to play the BTB 550, but it seems to be on a higher range of basses than the SR300, according to the specs at least. Thanks Basscommunity!