Lowe's just put the Porter-Cable C2002 on sale for $99, matching the price at Home Depot. It's larger than some that have been posted in this thread but it goes to 150 psig, which makes it handy for some jobs I do.
2011 Sunseeker 3100
2016 Ford Edge Toad
Very lightweight, plenty of power to blow out the water lines and it's got enough power to bring my rear tires up to 80psi (takes a little while, but not really an issue).
It's small and light enough that I carry it in the motorhome's storage compartment.
If you look for HF coupons you can buy it for $39, or if you have a 20% off coupon you can get it for around $47.
Bought one that looks very much like this one at Wal-mart for about the same $$.
Days camping (2016)----181 days
Days camping (2017) --- 82 days
2016 Wildcat MAXX 28RKX (33' TT), 2007 13' Scamp
2015 Ram Laramie Hemi, w/air suspension
30 years RV'ing
11 different RV's