Not especially rare. 32º Impulses were made by Smart Parts for National Paintball. For the most part they were stock with some minor milling done.

Yeah - 32* imps aren't really a hot commodity in the impulse world. Depending on ups and condition i'd say $100-$150.

Post a pic some we can give a more accurate quote.

Also - for more info check out the "Ultimate Private Label Impulse Guide"...unless you already have.

Well the good news is all that's a pretty easy fix.  Obviously it needs a deep, deep cleaning.  The valve and hammer are probably stock and really, if you plan on upgrading anything at all, start there.  NDZ will be your best friend.  They've started selling their valve again, and ram assemblies can be found pretty easily in the b/s/t here or on pbnation.  If the solenoid wires are still intact and not frayed or anything, a coat of liquid vinyl tape will do the trick.  Tapeworms are also pretty easy to find if it's unuseable.

There's a tube that runs the length of the body, yes.  Should avtually be attached to the back of the plug.  If you need any stock parts, I do have a complete ram assembly, and I think we might have a stock valve at the shop.  Just hit me up here or on the nation and I'll be glad to help out.