Marshall Sanderling Buyer's Guide
The Marshall Sanderling 18 is a fiberglass catboat first built in 1962 by Breck Marshall and still produced by Marshall Marine, with more than 770 examples afloat and a design lineage back to a 1941 Pop Arnold prototype. For a shopper seeking a used Marshall Sanderling in the United States, the appeal is a shallow-draft daysailer that can be trailered, rigged single-handed, and kept simple — but the details below separate a sound boat from a tired one.
Layouts on the Used Market
Every Sanderling shares the same 18 foot 2 inch hull with a gaff cat rig and a single 253-square-foot sail, a centerboard that lifts for 17-inch minimum draft, and two berths behind louvered teak doors with minimal sitting headroom. The defining layout variable is propulsion: many boats carry only an outboard kicker on the transom, which the builder's literature treats as ample for docking, while some were delivered with small inboards such as the Yanmar 1GM or Nanni 2.10 anchor. Choosing an inboard means accepting a large box in the center of the cockpit well; without it the boat retains positive foam flotation and a cleaner well.
Equipment and Common Upgrades
Given the Sanderling's daysailer intent, most gear on the used fleet is modest. A chartplotter appears as a frequent owner upgrade rather than factory equipment, reflecting owners who venture beyond the home harbor anchor. Beyond that, the only consequential buyer-side items are the propulsion choice already noted and the presence of a re-bedded or original portlight set, since the forward opening porthole is the main ventilation source and a known weep point.
What to Inspect
The strongest construction claim is the through-bolted overlapping hull/deck joint, which owners such as hull #66 (built 1964) confirm has kept deck leaks away anchor. The same owner documented the weak points: ports that weep and were re-bedded after two years, rot in the aft house bulkhead where water crossed cracked fiberglass tape, and a centerboard pivot-bolt encapsulation that cracked and leaked anchor. Also check the plywood cockpit floor, which on that hull needed reglassing where the original fiberglass sheathing wore away. These are the areas where a pre-purchase survey should focus.
Availability and Buyer's Takeaway
The used Sanderling market is centered in the United States. For a buyer, the checklist is short: confirm the hull/deck bolts are intact and dry, inspect the aft house bulkhead and centerboard trunk for prior water intrusion, verify portlights have been re-bed if weeping was noted, and decide early whether an inboard's cockpit box is worth the trade against an outboard's simplicity. A chartplotter, if fitted, is an owner addition rather than a factory promise.
Price & volume trends
Monthly asking-price and listing-volume trends for the Marshall Sanderling. The line shows the median ask each month; the bars show how many listings appeared.
Monthly breakdown · 4 rows
| Month | Listings | Median ask | Δ vs. last mo. |
|---|---|---|---|
| May 25 | 1 | $7,500 | — |
| Jul 25 | 4 | $9,999 | +33.3% |
| Aug 25 | 2 | $14,750 | +47.5% |
| Apr 26 | 3 | $15,000 | +1.7% |
Where they're listed
Marshall Sanderling listings appear across 1 country. United States has the most listings with 3.
Country view
3 listings · 1 country| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| United States | $15,000 | 3 | 0 | 100.0% |
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 |
|---|---|---|---|---|
| Cornish Crabbers Shrimper 21 | 21' | $ 50,955 | 17 | 5 |
| Marshall 22 Cat | 22.18' | $ 17,900 | 13 | 1 |
| Marshall SanderlingYou are here | — | $ 15,000 | 3 | 0 |