Depending on where you live getting assigned sub-varsity isn't too difficult. and honestly most people would say $150 for an 8AM-3PM tournament is worth the while and often that's about what you get. While I agree with the comment that better wrestling is easier to officiate, I think JV is a great place to get better as an official because of the lower level. You'll learn quickly to recognize locked hands and other various illegal holds because they happen often. While you don't see it often at the varsity level it can be a big call when it does happen. A friend of mine lost a state championship match by 1 a while back, the 1 point he gave up on locked hands was a big one!