I have 3; capacities are 5 tons, 7 tons and 8 tons. Now that I've worked out indoor storage, I'll probably sell 2 and keep 1 for the loading operation.
I got these (plus 2 others already sold) from Craigslist and eBay. If you're interested in any of mine, please let me know. Depending upon where you are, I might be able to work out something reasonable for delivery.