Two used boats are waiting in the boats and personal watercraft market, and they represent two very different ideas of summer. One is a 21-foot 1990 Supra Mariah, a dedicated ski boat with an inboard engine and a fresh-water history. The other is a 1985 Double Haul Sunrunner, a classic fiberglass bowrider sold by a private seller with a trailer included. The $4,000 price gap between them is the real question: what does the extra money buy you, and which one matches the way you plan to use the water?
Quick verdict: The Supra Mariah is the choice if you want a purpose-built ski boat with a composite hull, an inboard powerplant, and a condition story that includes indoor storage and recent attention to the gel and rubber rail. The Sunrunner is the choice if you want a complete, classic bowrider package with a lower entry price and a trailer already attached. Neither is objectively better; they serve different boating styles.
At a glance:
| Boat | Price | Price bar | What stands out |
|---|---|---|---|
| 21' 1990 Supra Mariah | $8,000 | Inboard engine, composite hull, ski boat, fresh water use | |
| 1985 Double Haul Sunrunner | $4,000 | Fiberglass bowrider, trailer included, private seller |
Where each wins:
21' 1990 Supra Mariah: The Supra wins for anyone who wants a true ski boat rather than a multi-purpose bowrider. It was stored indoors, has all stainless hardware, and got a new gel and new rubber rail. The upholstery and carpet are described as good, and the 351 PCM Cleveland block has a dealer inspection behind it. The composite hull and fresh-water usage make it a cleaner candidate for someone who wants a dedicated tow boat.
1985 Double Haul Sunrunner: The Sunrunner wins on complete, ready-to-go value. The listed package includes a matching single-axle roller trailer with a spare tire mounted on the tongue, plus a canvas bimini/cockpit cover. It's a private-seller listing, so the story is more independent, but the lower price and included trailer make it easier to get to the water with less outlay.
21' 1990 Supra Mariah
The Supra Mariah is listed at $8,000, and that price buys a lot of concrete detail. This is a one-owner boat that was stored indoors, with all stainless hardware, new gel, a new rubber rail, and good upholstery and carpet. The 351 PCM Cleveland block has 785 hours on it and was checked by a dealer. The inboard engine, composite hull, and fresh-water designation point to a boat that was maintained for a serious purpose. Choose it if you want a dedicated ski boat with a documented service trail and the reassuring feel of a dealer inspection. The limitation is the price: at $8,000 it's a substantial upfront investment, but the condition and focus are what you're paying for.
1985 Double Haul Sunrunner
The Sunrunner is the lower-priced option at $4,000, and it leans on simplicity. This classic fiberglass bowrider has a clean cream hull with retro brown graphics and comes with a protective canvas bimini/cockpit cover. The included single-axle roller trailer is a strong practical advantage, especially with a spare tire mounted on the tongue for road trips. It's a turnkey package described as ready for summer fun, and the private-seller listing means you're dealing directly with the owner. The trade-off is its 1985 vintage: even a well-kept classic demands a hands-on owner, and the details here are more about the package and trailer than about engine specifics. Choose it if you want a characterful bowrider with the essentials included and a lower upfront price.
Final choice by use case: If you plan to spend weekends pulling skiers on a fresh-water lake and you're willing to pay more for a purpose-built boat with a dealer-inspection history, go with the 21' 1990 Supra Mariah. If you want a classic bowrider for relaxed cruising, and you value having the trailer and cover already sorted for less money, the 1985 Double Haul Sunrunner is the sensible pick.
