LIMITED SALES AND INTEREST

I am posting this seeking feedback on a couple of issues. I am a realatively new seller on Delcampe. I sell stamps for collectors, and to date have listed over 100 items. I believe that my pricing falls within fair market value. I recoganize that in today's market challenges sales can be difficult. However, I get a large number of 'visits' to my items but no one purchases. To be exact I have listed three items far below accepted value and yet, still no response. Am I to conclued that the market has virtually collapsed? I understand that there are added-on costs when a buyer makes a purchass. I have no idea what the fees acutally are (or total), nor how many buyers have abandoned the purchases when given the final total. This information would be very usefull. Further, (and perhaps I have missed this) I do not see any option on the listings for the potential buyer to enter into a dialogue with the seller. By example I mean that other sites have a 'Contact Seller' option. Thank you, and any information which you can provide is most appreciated.