there are many offer your price name your price plugins but they only let send visitors emails without even registering
The OFFER YOUR PRICE plugin from Storeapps let visitors make definite offers stores them in database and letzt the admin send them according coupon to buy the product at the desired price
The OFFER YOUR PRICE plugin from Storeapps let visitors make definite offers stores them in database and letzt the admin send them according coupon to buy the product at the desired price