That's ok if you have the equipment to deal with full lengths, and need the full length.
But if you don't have the equipment, or don't need a multiple of 7.2m, then price difference can be totally different.
It all depends on what equipment you have and what you need.

I can work with either, but not everybody can.
If you don't have a pillar drill, scribe, centre punch etc. then that's something else you need to factor into the cost, and look beyond the basic material costs.