Uberti is one of many importers and they tend to make and sell decent guns for the money. That price, with a good tang sight, doesn't seem out of line. Look up the current street price for the same gun and see if it compares properly.
What model? Lever rifles in 45 Colt are nice, although not exactly "period correct"for CAS/SASS uses. I shoot one anyway.
"Stout" means different things; most Ubertis are reasonably-priced replicas of guns made over a century ago. Those replicas, like the originals, are capable of handling black powder pressures nicely. That fits the period when they were designed and what they were made for. Modest and average smokeless loads also do fine.
If you are shooting CAS/SASS you really don't need heavy artillery. If you are in a different market, like 150 yard deer or coyotes, you may want to find something designed and manufactured for modern calibers and pressures. Pushing a Uberti to the red line is not necessary when there are alternatives with current design and metallurgy available for fewer bucks.