jl35991 posts06-06-2016 5:53pmlast recapped, refurbed SA-9100 on ebay sold for $350...probably no way the repair and
Still $200...$250 will get things done for less. Furthermore, the price on nice functioning vintage unit will only go up.
On the listing you mentioned the repair on the amp was done to probably fix weak channel, but no actual "full service" was done. I haven't seen large filter caps replaced. The replacement parts worth was probably few $ including shipping.
I sold similar units at much higher dollar out of retail store.