Cosmic 2000s are decent, sturdy watches. Although they have a difficult-to-open case construction, making servicing more challenging (not all watchmakers will agree to service, as there is a risk of damaging the dial). Inside mine is a cal 1012 which is going strong, although not a highly sought after calibre.
The case and design are very 1970s...you either like that or not.
Cosmic 2000s are generally not prized by collectors for the aforementioned issues, reflected in a lower price.
More photos are needed to assess whether asking price is ok
😕. It seems perhaps a bit high, but if
properly serviced, maybe ok?