I have been tipping my pro shop guy for the last 4-5 year's for all kind's of ball work done. I normally don't tip for thing's like new shoe's, bag's, cleaner's, towel's, ect.
Last night I was talking to a few guy's who just picked up a new ball last night, 2 Invasion's and a Mission. I don't remember how we got to this topic but all I can remember is me asking these guy's if they gave the man a tip. All 3 said "No, I already paid $250+ for this new beast. Why would I tip the man?!" Not in their actual word's but the general idea. 1 guy said he will never tip any proshop because of the money he already make's. 2nd guy said he just don't feel it's needed. 3rd guy said he's never really thought about it but probably wouldn't tip anyway.
You tip your waiter/waitress, you tip your barber guy/gal, you tip your pizza delivery dude, why would you not tip your pro shop guy?
I tip him because I know he don't make a lot off each ball sale or anything else for that matter. On a typical new ball sale he generally make's $25-$30 at most. Most of his money come's in the form of ball plug and redrilling. I normally tip $5 unless he's getting me 2 ball's done in the same day then it's $10.
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Mike Zadler
"When in doubt, Pull out" - Rob Stone
Below, my stats from previous seasons:
http://members.bowl.com/SearchUSBC/ViewMember.aspx?prefix=552&suffix=12886