Ace Hardware (at least in my area) has this folding hand truck on sale for $20 right now. Supposedly on sale until the end of Sept. It has a 150 lb capacity. No bungee cords included.
http://www.acehardware.com/product/index.j...hId=21550685634
I checked it out - the weak link in the design is probably the nylon/plastic gearteeth on each wheel assy. They mesh with the aluminum gearteeth on the aluminum platform which cause the wheels to fold out when the platform is folded outward. The nylon/plastic compound will probably get chewed up by the aluminum if the wheel is banged hard against a curb or something. If this happens, the wheels won't stay in the open position.
I bought one anyway, despite the problem noted above. I have been looking around for a lightweight product like this and even the expensive ones ($100 +) use a similar approach for opening the wheels out, and reviews on the some of the other carts have noted the same problem.
I think that an improvement/retrofit would be to drill a hole through each wheel assy. and into the metal frame with the wheels in the open position. Then use a pin of some sort to 'lock' each wheel into the open position. If you did this before the teeth got chewed up, it would help prevent the damage in the first place. I'm considering using the metal hooks of a bungee cord for the pins. That way the cord will keep tension on the pins to keep them in place without being cumbersome. I haven't gotten around to doing it yet.
The cart mentioned in the first post can be converted into a hand truck, which would be more maneuverable than the four-wheeled one. And it will be useful around the house for other things. Just make sure to keep the tires inflated.