Two GREAT dirt pedals. You know how it is, other dirt pedals call... The Agro is the newer, no-lip version. Really versatile and can get really mean sounding. The BT has the original 12AX7 tube in it, for a crunchier breakup. Try lower gain tubes for more hair than crunch. I ran it like this as an always-on pedal. Both clean, w/o Velcro. [del]Agro: $130 shipped conus PayPal[/del] Blue Tube: $120 shipped conus PayPal Edit: As for trades, any kind of DIY parts (cabs, speakers, pedals, amps) or other OD's are fair game.