The Apache brand from Harbor Freight is awesome. Bought one years ago for my Spektrum DX6. And later used for the DX8. Did some testing of my own and now use them for some expensive camera gear. They've been through airports and fly in fishing trips. Nothing damaged. And half or less than the...
Yeah, it's a sweet crawler. But....that pricetag! If you really want a belly crawler, (I do) look at Texoma RC. You can build your own for less. He did a comparison to his.