I just dug out the manual (I keep all that crap here in my desk). Wouldn't cha know it has the capacity, but not the power. It is definitely a 12 gal model. I'm 99% sure it's a 5 HP, probably an older version of this one
. Sears.com shows it as priced at $80. Although I saw they had another, higher capacity one on sale for less. Were I you I'd probably just walk into the local store and see what's on special. If you don't like it, come back in a week when another one is on special, if you do, call it a day..
I bought mine after returning a gift. My (divorced) parents who would not be caught dead talking to each other managed to give me IDENTICAL cordless power tool kits for xmas a few years back. Dad gave me a receipt and told me to go nuts in the tool shop there. I think I had $140 to blow. I managed to walk out of there w/ the wet/dry vac, a 1/3rd sheet sander, and a bag full of hand tools. I felt like I was taking them! .. I finished my dining room set w/ all that crap!
Mine does have a 'blow' function too. I can't say I've ever used it. (Or imagined a use for it.) The attachment caddy on the back is kinda cheasy, but it works. I can't imagine a wet/dry vac caddy that actually works. I've never seen a vac w/ a good one. I wouldn't call that a big deal though..
Mine is one of the funky shaped ones, not the traditional trash can shaped kind. It is far shorter than most and has a sloped nose. It fits quite nicely under the tonneau in my truck once you remove the long extension tubes from the cheasy caddy..