The Dynamo is actually a 19". That's the only cabinet in the garage that actually belongs completely to my brother, though. I'd have to run any trades on that machine through him. As of now, I'm only authoried for a sale on that one.
At 19", though, it's not exactly an even trade. However, he has other boards. We'll just have to see (assuming you're even interested).
Otherwise, I have buttloads of non-functional or ugly machines. They're all 19" converted classics, though.
The only other 25" machine working is the Off-Road. We have two 25" kit cabs, but the monitors on both seem to be on the fritz.