Yesterday, I ordered a new RC10B74.1 after watching the 4-wheel drives (4wd) run at my local track. I went round and round debating because of the cost. I did look at a couple of used ones on eBay and on the Facebook marketplace. After looking at the condition of the used ones I felt more comfortable with going new even though they were way more expensive. I wanted to make sure I knew what I was getting, even though the thought of having to put it together really scares me.
Today, I did purchase a used RC10B6.2 roller; which means it doesn’t have any electronics used on eBay. I saved about $100 buying this one; this person only ran it on the carpet. Here’s a link to the RC10B6.3 page so you have a reference.