I've put $60 somethings worth into a shopping basket and it's free postage, so it must be over a certain amount free???
It's not worth for a couple of balls, you'd need to work out what you were going to do and then get at least a ball more, in case you needed it and you'd want the same dye lot. I'm thinking with overs I'll do say tops with a coloured border or stripes etc.
The good thing with crotchet is that all those bits of the same ply - rugs or shawls!!
I've really wanted to do something for DH and I with alpaca as well, and to spin our wool isn't worth it, once we paid for someone to spin etc etc and their price is so good... I've been bitten by the knitting/crotchet bug again, so have trolled about for patterns, wool etc.
I've found the UK and US have some beautiful crotchet clothing, which is really difficult to get patterns for here.