From my experience, BRNO rifles are very nice. They are no longer made under the name BRNO, but CZ, and although the manufacturing processes may have changed, the CZs are near identical to their BRNO ancestors. Try to get a BRNO model 2.
About $150
Most likely a store brand. Proofhouse.com has a store brand chart that might help
Proofhouse.com has store brand chart
Brand new $700
Proofhouse.com has a store brand chart.
Marlin
Eley Tenex
Winchester and Browning
Proofhouse.com has a store brand chart that might help.
Store brand for Sears IIRC
Proofhouse.com has a store brand chart.
Proofhouse.com has a store brand chart.