Assuming your part-timer is getting a mix of quality,
he's getting a very good deal, although not a steal.
The value depends a lot on the quality of the used ball.
On eBay you can buy best-quality ("AAA") Pro-V1s
at auction for about $25+ per dozen plus shipping.
Good-but-not-best ("AA") go for about $15 per dozen.
Also if you don't want to do auctions you can by them
outright on the Web for $32 per dozen (AAA) and
$18 per dozen (AA), plus shipping. See
> Could anyone offer a value for used Pro V1's? One of the part-timers on our
> golf course grounds crew is a pretty well-off retiree and has offered to pay
> $1.00 for each Pro V1 that our Hispanic crew members find. I know that it's
> like "found" money, but a buck for a Pro V1 seems a bit low.