I believe i bought the same trolley design from the same seller apx 4 yrs ago, and it barely lifts the machine off the ground, as can be seen in the photos with the legs off the ground only a few inches, and the trolley wound up all the way on the small car jack....
It was good only to take legs off etc, but mine was useless moving much around cause the design would collapse on itself. (I upgraded very quickly and junked the black one).
Anyone buying this trolley (or considering) shld be testing/inspecting/or having somneone check it for you first. The red flat base ones we have seen on AP alot, are far better IMHO.

The $1 start might be for a reason.......hope it helps....

Good feed back Cavey. Defiantly worth asking questions before any eBay purchase.