AC problem - what does this reading mean?

Spring is here, and that means that I have to try and wake my ac system up from hibernation. And problems begin...

Very high pressure on low side, nothing much happening on high side.
No cold air blowing, the ducts are warm. Clutch is kicking in, compressor is working, pressure goes back up if I let some out. But no pressure fluctuation on the gauges.

Could it be the expansion valve? Or is my AC compressor gone? It seems like it runs fine, still builds pressure, and not seized...

 

Ugh, yeah, you guys are right. This thing is shot. I bleed off the system and tried to put more freon in, and it just doesnt do anything. The compressor clutch comes on but it doesn't suck any freon, pressures stay the same.

I guess the next question is, should I replace the compressor myself, or have TA do it? Is it pretty easy to do in a roadside / back of truck stop type setting?

 

I have plenty of cash to play with, I mean, I am an owner operator. It's just a question of how much I'm willing to part with. When there is no choice, I drop 10 grand. When there is a way to save money, I get my hands dirty to save $50.

I see that there are refurbished/chinesey compressors online for $200ish, and I also see that it looks pretty easy to replace myself - just 4 bolts, a couple lines, and the belt. Gonna call freightliner tomorrow and see what price they have for a civilized compressor, and then gonna decide.
Any thoughts?