Hello 'trey',
You say the transaction is over 90 days old, - I am surprised the seller continued to talk to you past day 60. At this point you cannot file a claim, nor can you even leave feedback. Have a look at the following link about items that are 'not as described' (items that don't work would fit in here) and those that simply don't arrive:
http://pages.ebay.ca/help/buy/item-not-received.html
The seller knows that there is nothing ebay/paypal can do to help you now. It's one of the problems with some ebay users, - 'trust'. You have a low feedback score and too many sellers will see this as an opportunity to take advantage of your unfamiliarity with the system. If you have a problem with an item, file a claim for a refund no later than day 43 after you paid.
If you used a credit card then go for the chargeback option. Some cards offer longer deadlines for this than others, so if this is a possibility for you, do it now.