It may be $4.95 now, I do recall it was $4.25 for one of those square boxes at one time! LOL
If you calculate and print your postage online you do get a discount & free shipping confirmation so I've been doing that now since I bought a printer again.
For the price of a kitchen scale at Target that maxes out at 5 lbs I got a 12" square shipping scale at Sams Club that weighs up to 400lbs both scales are the same price: $49.99. I'll never be able to put something that heavy on it but it's a far heavier duty scale than the Target one, just a tip for those of you shopping for a scale.