Irwin Hyundai

I purchased a used car from Adham at the Irwin Zone a few days ago and traded in a vehicle. I was only offered $400 for my trade in and was told that it's because it was old, in bad shape, check engine light on and had over 200,000 miles. I finally got them to allow me $1,400 for the trade in after I told them other dealerships had offered me more. Much to my dismay I see that they now have my car listed for Retail Value of $3,950 on the website and their sale price is $2,500. I find it very dishonest that they were telling me my car was only worth $400 and yet less than 5 days later it's now worth $2,500. This will be my first and last car I purchase from this dealership. I understand everyone is out to make a buck however that is down right deceptive in my opinion!