Peter_C is right. I used to own a tadpole trike and I loved it. I got more into hill climbing and didn't ride it enough to keep the recumbent muscles in shape, so I sold it. Recumbents use some different muscles than upright (DF) bikes, so it takes about a week or two to get used to riding one.
This is what I used to ride, a Sun EZ-TAD CX. I bought it on Craigslist in great condition for $400, which was a steal. It sold at my LBS on consignment for $650. I got $560 of that and applied it towards the purchase of the folding Bike Friday that I use for hill climbing when it's impractical to transport a full-size road bike.
The headrest is homemade. I made it out of aluminum tubing and hose clamps, with a pool noodle float toy as a cushion. Redneck engineering at its finest!
