Tes 28 Magnam Buyer's Guide
Tes Sailboats built the 28-foot Magnam to Tomasz Siwik's design from 2010 onward as a compact cruiser that trails behind a car. Used examples split into a swing keel form for easy launching and shallow water and a fin keel version for enhanced stability, so judge each boat by its own setup.
Layouts on the Used Market
The Magnam was sold with customizable interiors accommodating two, four, or six berths, always with both bow and stern cabins. Period reviews describe the below-decks space as comfortably housing four adults, with a twin berth forward and a surprisingly roomy quarter berth aft, plus a private head with shower and a complete galley including a stove. Teak and holly floors and solid well-hung cabinetry with extensive storage are consistent interior traits. The deep, safe cockpit is closed by a folding swim platform, and steering may be either wheel or tiller depending on the individual boat.
Equipment and Common Upgrades
A buyer should assess each boat on its own inventory rather than expect a standard fitout. The most consequential items to verify are the Honda outboard of 10 to 15 horsepower that pushes the boat alone, the fused main panel with shore power and the navigation lighting, and the sail handling setup — two winches, jib tracks with cars, and triple organizer blocks and stoppers that put all lines to the cockpit. A lifting swim platform, bow pulpit seat, and double lifelines round out the safety and comfort hardware worth confirming on a specific hull.
What to Inspect
The swing keel versions carry a 220-pound pivoting foil, and its pivot hardware and trunk seals are the natural points of wear over a trailer-sailer's life; examine the trunk for staining or softness and work the board for free movement. The builder listed the fixed hull windows with a qualifying note, so check each one for crazing or leaks at the framing. The kick-up rudder's up and down control lines should be exercised for easy travel and the pintals inspected for play. Confirm the laminated hull-to-deck joint is intact along its full length, since the structure depends on that glued and fastened bond.
Availability and Buyer's Takeaway
The typical market for these yachts is Poland.
- Confirm keel type and inspect swing keel pivot and trunk
- Check every hull window for leaks or crazing
- Exercise kick-up rudder and inspect its fittings
- Verify hull-deck joint continuity all around
- Test all cockpit-led lines and winches under load
Price & volume trends
Monthly asking-price and listing-volume trends for the Tes 28 Magnam. 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. |
|---|---|---|---|
| Apr 25 | 1 | $80,274 | — |
Comparable models
Similar length, displacement, and era. Open a row to compare that model's market page.
Similar boats to compare
3 similar designs| Model | LOA | Median ask | Listings · 12 mo | Active · 90 d |
|---|---|---|---|---|
| Jeremy Rogers 28 | 27.67' | $ 9,709 | 30 | 10 |
| Thames Marine 28 | 27.5' | $ 11,487 | 21 | 4 |
| One-Off 28 | 28.18' | $ 40,778 | 14 | 2 |