When you're shopping in the boats personal watercraft market, the biggest question isn't just which boat looks better in photos-it's how much money and effort you'll need to put in after the handshake. These two used freshwater boats spell that out perfectly. The 21-foot 1990 Supra Mariah is listed at $8,000 and presents like a boat that's ready to launch. The 1999 Malibu is listed at $2,000, but the seller notes they're keeping the motor for a pickup, so that lower entry price comes with a significant project attached.
Quick Verdict
If you want a boat you can use right away, the Supra Mariah is the one to beat. It has a documented 785-hour PCM engine, new gelcoat, a new rubber rail, and a trailer with new tires. If you're a capable wrencher with a motor source already in mind, the 1999 Malibu leaves a large price gap to spend on repowering.
Side-by-Side Comparison
| Feature | 21' 1990 Supra Mariah | 1999 Malibu |
|---|---|---|
| Price | USD 8,000 | USD 2,000 |
| Condition | Used | Used |
| Hull Material | Composite | Fiberglass |
| Fuel Capacity | 11 - 20 gallons | 11 - 20 gallons |
| Primary Fuel Type | Gas | Gas |
| Water Use | Fresh Water | Fresh Water |
| Boat Type | Ski Boat | Cruiser |
Where Each Product Wins
The Supra Mariah wins for anyone who values readiness. The listing highlights one-owner history, indoor storage, all stainless hardware, new gelcoat and rubber rail, good upholstery and carpet, and a dealer inspection. It also comes with a Trail Master trailer with new tires. The Malibu wins strictly on price-it's the lower-cost way to get a fiberglass hull and a project you can build around. It also has a common inboard/outboard layout, though the seller explicitly states the motor is being kept, so budget for a replacement.
21' 1990 Supra Mariah Boat
This is the ready-to-run option in this pair. The listing describes a one-owner boat that was stored indoors, with all stainless hardware, new gelcoat, and a new rubber rail. The upholstery and carpet are said to be good, and the 351 PCM Cleveland block has 785 hours. It also includes a Trail Master trailer with new tires, and the seller mentions a dealer inspection. If you want to spend your summer on the water instead of in the garage, this Supra Mariah is the compelling choice. The obvious trade-off is the purchase price-it's the more expensive of the two. The composite hull is also worth considering if you have a preference for fiberglass.
1999 Malibu boat
The Malibu is the budget entry point here, but it's also the bigger project. The listing describes a fiberglass-hulled cruiser that runs on gas and is set up for fresh water, with 11-20 gallons of fuel capacity. The catch is in the seller's own words: they are keeping the motor for a pickup and are selling water-cooled headers and other motor parts separately. That means you should plan for repowering before this boat can take you out. The upside is the low entry price, which gives you budget room to work with if you can source an engine. If you're confident in your mechanical skills and want to build a boat to your own spec, the Malibu gives you that freedom. If not, the missing motor makes it a risky purchase.
Final Choice by Use Case
Choose the 21-foot 1990 Supra Mariah if you want a freshwater ski boat that's ready to go, with a trailer and fresh gelcoat already accounted for. Choose the 1999 Malibu if you have the skills and budget for a repower and you'd rather start with a cheaper hull.
