Hi, im new here so bear with me as I find my way around. I recently bought my first wheelhorse. It's a 312- 8. I'd really like to get a tiller attachment for it. I only found one on local Craigslist and the guy wanted $650 for it. Am i gonna have to pay that much for one? What is a reasonable price and are there other places i should be looking for one? Thanks so much?