Hi, my TP-Link TL-WDR4300 worked perfectly with DD-WRT. It's also going for $68. I paid $69.99 for it on December 31st, 2013.
I had version 1.3 for TL-WDR4300. Was able to flash to it just fine despite DD-WRT's website saying it was for version 1 or something like that.
Go for that instead!
Edited to replace non-Prime link with Prime link, as requested in OP poast.
Edit2: You should also be able to find my review there for the product, too.
Edit3: Looks like version 2 routers are out now. Not sure if those're compatible, but I'll attempt getting one next month and verifying.
Edit4: Version 2 routers seem to be compatible.