I discovered by chance this week an unknown to me samplesets producer based in Italy. He proposed 2 organs. A positiv and an historical organ of 1838. The first one is totaly free to download. There is an extended version (38€). For the second organ there is a free demo with all stops (but not all chanels and with a little chime ringing from time to time). The complete version is proposed at 98€. A third organ is in preparation.
I explored quickly this both samples this afternoon with some nice little pieces composed by the Padre Martini.
The graphic presentations are very neat and the sound recording seems very successful to me.
Don't forget to start the engine and begin to play !