15% is a good general "off list" price to get. This is a guideline, not a rule. The right answer might be "depends"
- If the dealer took delivery yesterday and hasn't paid any substantial interest on the unit, he might make the deal of the century IF you are prepared to make the decision immediately.
- If the unit has sat for 13 months, the dealer might make a great deal to cut his losses.
- If the unit has a less popular interior color scheme - you might get a deal
Generally you'll get better percentages on bigger units than on the smallest ones, but often people outgrow small units so you see a lot of these up for sale on our own classifieds, ebay, craigslist, etc.
If you really want to save money, but a gently used one - 2 to 3 years old. Talk about CHA-CHING.
I bought new twice, and I REALLY like the new just coming out "Serenity 27 FB CCD" but I'm just NOT going to spend that kind of money again. Besides I've learned that you might love a unit online, but that in person it's not all that - and vice versa. The Ocean Breeze series looks better than it photographs. At this point to get what I want, I'll probably buy a 27 foot hull and rebuild the interior - custom to my specs.