I hate to say this, but I think that you are going to take a 20 - 25% hit to sell it. It has to be attractive enough to the buyer to buy used vs new and I think that the correct number is going to require at least a $1500 - $2000 difference for most people to buy used and not get the 0% financing. Even though the warranty is transferable, the time that you owned it is going to be deducted from the warranty's value in a buyers mind. Assuming that is 6 months, even that 6 months has a value deduction. You also have to consider that you have the bagger kit in the package. To some people this might not be necessary and have very little value to them, even though you paid a lot to purchase it. The cover, grill guard, and spare blades will not bring any additional monitory value to the package and you will be just throwing them in to sweeten the deal for the purchaser. You could probably sell them on e Bay for more than they will add to the value of the tractor.