the sears and western auto guns were contracted by manufacturers like savage Winchester Remington and a few brownings. so if you are worried about quality don't. as far as price take it to a local dealer and have them give you a rating usually nra scale then look it up in a current blue book.
50-125 or so
100 USD
50-200
10-100 usd
50-115
25-125 USD
100-300 or so
50-125
10-125 USD or so
50-100 USD
50-250 USD or so
10-100 usd