Hi,
No I haven't bought from him - to be honest his prices always seemed a little high to me.
But I know some of the banded lines are dominant so, if his was that reliably genetic, then you should have a fair shot of getting the pattern into the other morph. Nobody can say for certain though - especially if you put it with another pattern morph.
If it is, however, just a pattern on a wild type the the chances get less reliable but it definately still counts as a possibility.
If he sends you some pics of the results of a pastel tiger pairing I'd love to see them. Roussis Reptiles had some amazing animals on their site a while ago and I would love to try and line breed something similar.
Check these out.
dr del