I agree that single speed suspensionless x-mart bikes can be decent cheap rides for the verry casual rider. My old k-mart BMX I had as a kid (chrome "team" murray) lasted me nearly 5 years with only some brake pad replacments, and a new chain once.

Given you want to give it a full once ocer and insire everything is tight, but after that it's going to be decent.

If it has a deraileur, or a suspension...steerr clear though. Even teh bottom end suspension forks with frame cost as much as some of these bikes whole. The deraileurs are so cheap that shimano doesnt even talk about them on their website is scary enough....let alone the no-name 1950's tech clones you find on these bikes.

Oh, and even if I bought a bottom end bike and planned on using it more than a few miles a month...I would get the brake calipers swapped out for a better pair. I used an x-mart bike last year and managed to destroy both calipers in under a month under "regular" use. Those calipers are strong enough for a 100lb child...but nowhere near strong enough for me when I weighed 260lbs....and i doubt it can handle me at 220 now either. case in point...the brakes are soft steel, you can bend them with your hands while they are attatched to the frame.