there are so many at/under $4 but here's my list of cheapies:
Casa de Garcia $1.50 (good yard/garage smoke but not a whole lot more)
Perdomo Slow Aged 826 $2
Partagas $2-5 depending on which one, up to $15
Cult $3.50
5Vegas classic (most vegas are affordable in this price range really) $2-4
Flor De Oliva $1.50-2.50
Isla del Sol for the rare infusion flavor $3
Diamondback $1.50 (probably my favorite bare bones broke $$ cigar!)
baccarat for real mild (i'm not a fan of a smoke this mild but it wasn't a bad gar) ?? $2 ??
carlos torano 1916 about $4
Curly Heads (inconsistent reviews but i do enjoy them, haven't had a poor one yet) $2-4
There are so many once you break the $4-5 point to choose from. the CT 1916 was my most recent cigar and was very enjoyable, mild in front gaining strength to the nub. nice flavors and great burn.
my co-worker smokes Don Rafael as a daily smoke....i cant say that i will ever be buying those things....he also doesn't keep them properly so if i do end up with one in humi i usually let it sit for at least a month then it becomes more tolerable.
Cheapies i Avoid:
Quorum (aweful!!!)
Don Rafael (read above)
factory thowouts (really...)
cuban rejects ( i had one decent one and rest junk, b-day gift from non smoker)