Got a prospect - newbie needs quick advice

[chesapeake724]

Thanks, gents.

I'm not sure of the trailer brand, and it is a major concern. I had a serious accident as a newbie trailered-boat owner, so I'm hyper-wary about my trailers. I thought at the least a new coupler and poly rollers all around, but I didn't think about MJ's point that maybe they're not so easily replaced. I assumed it was sort of a standard mount/spindle for all rollers.

I'm grateful for the help and will post how it turns out.