I too have a lot of obscure folk (Irish and American folk LPs mostly) by unknown artists. Probably around 40 to 50 LPs and folk CDs too.
However, it is a little harder for me as I don't have a car and have to take buses to the post office (in California) so I cannot take too many at a time. Some are more with a rock style (folk rock) but I have tried record shops (none that close to me and involves 3 buses each way) to get to Claremont, California which would be my closest record store. They are not that big in dealing with folk LPs and you are lucky if they give you one dollar for an obscure folk LP.
I don't really want to go to Ebay to sell.
Tried once putting an ad in the local Recycler Newspaper (free to place ads for things to sale) only got one phone call. Guy came by and just bought about 7 or 8 LPs. Tried putting an ad in again but no one called at all so I don't really know how to sell them.