Hey I found an old Staiger sprinter today at a thrift shop. Its 15$. It is a 5 speed with suntour components. Stem shifters. Paint and decals are faded, but not in bad condition. It also has an old brooks saddle. My question, are these good quality bikes? I know they're rarer, being made in germany, but is it worth it to buy it and spend time and $$ fixing it up?