Neptun 31-2 Buyer's Guide
Shopping the used Neptun 31-2 means looking at a 31-foot sloop-rigged cruiser from the Neptun yard, produced between 1976 and 1992 with Anton Miglitsch as designer. She is a solid-fiberglass boat of 4,500 kg displacement and 1,500 kg ballast, a fin keel with spade rudder, and a single Bukh diesel — a simple, period-typical cruiser whose age and two production phases shape what a buyer should check.
Layouts on the Used Market
The 31-2 ran unchanged in footprint across the build period, but a 1985 revision moved the windows from the fuselage into the superstructure. A buyer will therefore meet two visual generations: early boats with hull-shell glazing and later boats with coachroof glazing. Cabin volume is governed by the 3.15-meter beam and 7.8-meter waterline common to all examples.
Equipment and Common Upgrades
Two items are commonly fitted on boats in this class: cabin heating and an autopilot. For a buyer, heating speaks to comfort in the Germany-market seasons where these boats concentrate, while an autopilot reduces single-handed watch burden on longer passages. Beyond those, the one factory power variation worth noting is the engine — the standard Bukh 20 HP or the alternative Bukh 36 HP — which affects both thrust and the spares you will hunt for.
What to Inspect
On pre-1985 hulls, the windows sit in the fuselage itself, so inspect the hull-shell penetrations for any staining, softness, or past sealant work where the glass meets the load-bearing skin anchor. Later boats moved glazing to the superstructure, but coachroof seals still deserve a check for leaks into the cabin. Confirm which Bukh engine is installed — the 20 HP or the 36 HP — since the difference changes vibration, thrust, and parts sourcing. Otherwise the solid-glass hull and deck need only the usual fiberglass survey for impact and osmotic signs.
Availability and Buyer's Takeaway
These boats are typically found in Germany. Before committing, run through a short checklist:
- Confirm build phase by window location (fuselage pre-1985, superstructure after)
- Check hull-shell window seals on early boats for past leaks
- Verify installed Bukh engine variant and running condition
- Survey solid glass hull and deck for impact or osmotic damage
Price & volume trends
Monthly asking-price and listing-volume trends for the Neptun 31-2. 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 26 | 1 | $5,485 | — |
Where they're listed
Neptun 31-2 listings appear across 1 country. Germany has the most listings with 1.
Country view
1 listings · 1 country| Country | Median ask | Listings · 12 mo | Active · 90 d | Share |
|---|---|---|---|---|
| Germany | $5,485 | 1 | 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 |
|---|---|---|---|---|
| Elan Boats 31 | 30.84' | $ 47,629 | 13 | 3 |
| CAL 31 | 31.5' | $ 9,900 | 13 | 0 |
| Neptun 31-2You are here | — | $ 5,485 | 1 | 0 |