This thread makes more sense now that I read you're looking to buy...
The single, original robe was lost/deleted. IIRC, the owner was banned for duping and the robe along with his other possession were deleted. The robe had 3 INT and 250 luck.
There were also "Acolyte of Relvinian Robes" and "Servents of Relvinian" robes. But they do not contain any stats.