I have a few suggestions. Your website looks very bare and kind of empty. Whenever someone comes to your website you want your website to look busy and alive with listing and resources. You also need to make it easy for them to submit a listing. A user is not going to waste the time to email you whenever they can just go somewhere else and sign up very easily without the wait. You can easily provide this with a paypal account and some PHP coding. You need to give them something other than what someone else bigger and better already offers. I hope this helps.