Depending on where you live there usually is a Facebook group where you can sell. Facebook calls it a "marketplace" or something like that. Again I second the idea of taking pictures. The more pictures you have with excellent descriptions of what is being shown the more likely you will interest a buyer. Also, consider posting a video to your advertisement as well. Something others have not mentioned is take pictures of any defects you know about and disclose them in the advertisement. The reason for this is you don't want a buyer showing up only to be mad because an obvious defect such as a scratch or ding wasn't disclosed and they feel they wasted their time. Buyers appreciate honesty and it will go a long way in negotiations over price. The buyer doesn't want to be stuck with a lemon and if you are honest about things they can see then they will be willing to be more willing to think that the things they can't see are ok. A few other things. Do all the maintenance that needs to be done before posting the advertisement. This means if the tires are over 7 - 10 years old then replace them, if the oil (engine, generator) hasn’t been changed have it done. If for any reason you can’t do something such as replace the tires due to cost keep in mind that you will take a massive price hit because any smart buyer will estimate very high for the cost of new tires or other deferred service work. Check the sealants, if they are old or cracking then have it taken care of.
Most serious buyers will want to drive the unit and will also want to have it checked by a mechanic. I would ask qualifying questions such as how are you planning on financing this unit or something like that. If they say they are “just looking” and they still want to drive it I would suggest that they come back when they have decided that they want that particular unit subject to a test drive. In any case don’t just hand over the keys to anyone. I advise driving the unit to a parking lot or other out of the way area and letting them drive around. If you feel comfortable with their ability to control the RV then take them on a defined route that you have prechosen for ability to avoid sticky situations such as difficult turns etc. If they want an inspection then offer to drive it to the inspection location for them and don’t leave it unattended.
If it is priced right, you have good pictures and sell it well you should get top dollar in this market.
FMCA member