If you have the part number from the Parts Catalog (pdf on this site I believe) they often come up on ebay with the p/n from various yards that sell there. Make sure the seller has high 90s' to 100% feedback rating. Make sure they have good pictures and that the housing isn't cracked or connector damaged. The prices are all over the map. I think I've even gotten one for just $40 or so before. You can search the "Sold" listing for Intrepid/PCM/ECM or any of the year part numbers from the Parts Catalog to see what they have been selling for. As time goes on, fewer are available.