If you are going to be racing, I would buy from someone with recent experience building winning sails in your class. Since the P19 is almost dead, that's hard. Sabre built some sails a few years back. Ullman can scale the cuurent Tornado main and the Glasers (Tornado sail designers) just openned their own shop.

If you have a good local shop, you will probably get a good sail. The design will be either what they built the last time or a couple years old if they have been watching other designers. If they stand behind their product you will probably be happy.

If I were buying, the order would be Ullman, Glaser, small local shop, and Sabre. If you are willing to deal really long distance Landenberger and Ashby build some really good sails too.