The judge sentences Silas to "six months" of community service. Community service sentences are expressed by number of hours, not calendar time.
Andy describes his guitar as 1956 Les Paul, which would have a gold finish with white P90 single coil pickups. The guitar he shows them has humbucking pickups (introduced 1957) and a sunburst finish (introduced 1958), which makes it a 1958-60 model. If it were genuine, it would be worth up to $20,000 (possibly more) rather than the $2,000 he claims it would be worth on e-BAY.