If that has the invector choke system you got a steal. The A500R is a short recoil operated (vs long recoil on the A5). It has a harder kick than the A5 and is not as reliable cycling. It wasn’t that popular and has no (or little) collector value.
The A500G (G = gas operated ) was more popular and evolved into the silver and Gold series.
But for $160 it is a Browning and with removable chokes it should be a very useful hunting gun.