I think my brother-in-law's Blues Junior sounds better than my Fender Twin Amp

[NBarnes21]

Get it biased by a tech.  Many fender amps are set up "cold" (more headroom!) that makes them sound lifeless.  New tubes might be in order, too.  It'll cost a little bit (less than $75 in labor) but will be worth it. 

Think of it like changing the oil/timing on a car.  It can be a great car, but if something's not set right, that little Ford Pinto will leave you in the dust.

Used twin reissues go for about $400-600 around here. 

Thanks for the info, I will probably do that to see if I like the tone afterwards.  I'm bummed that they don't have much resale value, though, I'd like to sell it if I still don't like the sound.