Log on to ebay.com. Open an account. You will need to input your personal information and payment details. Set up a paypal.com account to receive payment.
Take photographs of the videos and upload them onto your computer.
Go to the "My eBay" section of your eBay account. Choose the "sell items" option from the drop-down list.
List the videos one by one. Upload a photograph for each video and give a brief description. Research if the film is available on DVD--if it's not, then mention this in your posting. This may help to encourage a sale.
Take any remaining VHS tapes to a local flea market to sell at a minimal price. Provide any information you feel may help the sale, such as if it's unavailable on DVD or a limited special edition.