i guess we're kinda high for sharpenings compared to your area too...we charge $8 off the saw and $12.50 on the saw, but we're within a dollar or so of the other dealers in our area so maybe it's a regional thing? As for chain prices, stihl msrp is awfully high on chain since it's all done by the drive link. We tend to trim those back a bit from msrp, esp on 18 and 20" .325 chains (ie 26rs 74 and 81 for stihl and 23rs/25rs 72 and 78 for husky) and some of the larger 3/8"
Could be regional, more likely I'm just out of touch with costs
But I'm glad I can get by with my so-so hand filing most of the time.