The $3/day parking that I use is called "Park & Shuttle," it's on Yale. Exit I-25 at Gibson East, drive east to Yale, turn right/south and look for the big orange arrow on the right/west side of the road. It's the last off-airport lot before the terminal.

Pricing is $3 uncovered or $4 covered parking with a coupon, military ID, or AAA card. $1 more without coupon or aforementioned ID. Using this lot is pleasant, the shuttle bus is always prompt and I've never had to wait either leaving or returning on a trip. Their website is http://www.parkandshuttle.com

Be aware that if you return to ABQ on an evening flight there is practically nothing still open inside the terminal, just the Hudson news shop. I landed at 9:35pm the other night and nothing was still open. I was glad I still had my stash of Clif bars after flying on Southwest from LGA-MDW-ABQ.