I am kind of with mart but rather than knowing its' value, I like to know who made it and when before selling. As to eBay, if you have no monetary attachment to this mold, I would just set an opening bid level and let it ride. You have the prospect of being very pleasantly surprised or hugely disappointed or dismayed that no one bid. Any auction venue is a snapshot in time of what bidders will pay or even if they will bid. I do not know the spongware market at the present time but if it has cooled off, you may want to hold on to your lamb mold for awhile. If it gets knocked off a shelf and breaks, you may have wished you took the chance to sell it. If there are no other pottery pieces with the ORLICE mark, pottery collectors may not pay a premium for it (too rare for demand). If this is a rare spongeware lamb mold and everyone has a solid yellow or other color, this color may bring a premium. You could always set a reserve at a level you are comfortable with and if it does not reach the reserve, at least you did not 'give it away'.