Depends on your cost priorities. If you're basically just walking by the box anyway while doing something you'd be doing otherwise, sure it's cheaper to drop $

Depends on your cost priorities. If you're basically just walking by the box anyway while doing something you'd be doing otherwise, sure it's cheaper to drop $2 for a disc. If you have to make a deliberate trip, you've transportation & opportunity costs. 2 round trips to the box, just to get/return the disc, is 6 miles total (1.5 miles one-way by road & parking lot) for me; at >$3/gal gas (wear/maintenance not included) that's >$1.50 plus the $2 rental. Then there's the time spent getting the disc, as several people wait around for someone to fetch it; if we're already at cumulative $4 cost, I'll pay the extra $1 (<$0.25 each) just so the group can watch what we want right now with a mere wiggling my thumb and not wait around half an hour.