Compromis 850 Buyer's Guide
Shopping the brokerage market for a Compromis 850 means looking at a Frans Maas-designed mid-seventies masthead sloop built by Zaadnoordijk in small numbers — under 200 left the mold. She is a 28-foot fin-keel coastal boat in solid fibreglass, earlier than the better-known 777/888/999 center-cockpit line, and her appeal rests on beamy volume and light-racer responsiveness rather than offshore credentials.
Layouts on the Used Market
The 850 carries a length-to-beam ratio of 2.80 and a beam just over 10 feet, a proportion the review rated roomier than 79 percent of comparable sailboats, so even the standard aft-cockpit plan reads as generous for a 28-footer. Fresh water is 106 liters (28 US gallons). The fin keel draws about 4.27 to 4.57 feet by load, letting a buyer consider shallower berths than many fixed-keel contemporaries demand. With fewer than 200 built, layout variation is limited and most survivors reflect the original Maas coastal-cruiser arrangement rather than later refits of the marque's bigger sisters.
Equipment and Common Upgrades
Given the sparse upgrade history, a buyer should focus on the systems that matter for a 10-horsepower Bukh DV10 diesel with only 8 gallons of fuel: a reliable charging circuit and a sensible house battery bank outweigh creature comforts. The masthead rig's original 3/8-inch sheets — 28.1-foot jib and genoa, 70.1-foot mainsheet, 61.7-foot spinnaker — are worth checking for UV and chafe, and a roller-furling genoa is the single most consequential sail-handling change on a boat this size. Beyond that, a functioning fresh-water system at the 28-gallon capacity and basic coastal navigation gear are the practical thresholds; stereos and galley extras are secondary.
What to Inspect
The capsize screening value of 2.13 means the design would not be accepted in ocean races, and the Motion Comfort Ratio of 17.8 sits below 73 percent of similar boats, so assess hull integrity and rig tune against coastal-use wear rather than offshore load. Confirm the immersion rate of about 904 pounds per inch against any added ballast or tankage, and verify the fin keel and spade rudder unions at the hull for play.
Availability and Buyer's Takeaway
Regional availability is not characterized in the brief, so treat the 850 as a scarce Maas design best located through specialist brokers. For a buyer, the checklist is short: verify beamy interior volume and 4.27–4.57 ft draft suit your berth; confirm the Bukh diesel and 8-gallon fuel are adequate for your range; inspect fin keel and spade rudder; check original 3/8-inch sheet sizes if re-rigging; accept her as a coastal shorthanded sloop, not an ocean racer.
Price & volume trends
Monthly asking-price and listing-volume trends for the Compromis 850. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 1 row
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| Sep 25 | 2 | $9,217 | — |
Where they're listed
Compromis 850 listings appear across 1 country. Netherlands has the most listings with 2.
Country view
2 listings · 1 country| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| Netherlands | $9,217 | 2 | 0 | 100.0% |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
5 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Maxi 84 | 28.02' | $ 12,863 | 21 | 7 |
| Cobra Yachts 850 | 28.5' | $ 8,117 | 17 | 2 |
| S2 8.5 | 28' | $ 12,000 | 13 | 7 |
| Aloha 8.5 | 28' | $ 9,400 | 10 | 5 |
| Compromis 850You are here | — | $ 9,217 | 2 | 0 |