AnalysisSeptember 10, 2026
Field Note — What's really moving the price on 1987 GT Performers
GT's 90-day sold average is up 25.8% across the brand, and the 1987 Performer is doing more of that work than any other model — 7 comparable sales in the last 90 days averaging $2,461, against $1,357 across the 3 comps we have from the prior period.
That number is misleading on its own. Comparable sales in this window swing from $1,050 (fair condition) to $3,400 (excellent), and three separate excellent-condition examples sold within five weeks of each other — $3,150 on July 18, $3,400 on August 21, and $3,400 again on August 22. Lower-condition examples from the same year sold for $1,050 to $1,825 in that same stretch.
So the average isn't rising because 1987 Performers are worth more across the board — it's rising because a cluster of well-preserved examples came to market together and pulled the mix upward. Comparable fair-condition bikes are still trading in the low-to-mid $1,000s.
Seven comps is a thin dataset for a model with this much year-to-year variance. Treat this as one to watch, not a confirmed trend, until more sales close.
View model data →AnalysisSeptember 10, 2026
Field Note — What the Decade Pro reissue means for original 1987 prices
Mongoose's Decade Pro rejoined the Classics Collection lineup on June 9, 2026, alongside the FS-1 in a new blue-and-white colorway, at a retail price of $599.
On the original 1987 Decade Pro, we have two comparable sold transactions since the reissue: an excellent-condition example sold for $1,350 on June 9 — the day of the launch — and a fair-condition example sold for $1,599.99 on August 3. Both sit well above the $599 retail price: $1,350 is a 125% premium, $1,599.99 is a 167% premium. Two comps isn't enough to call a trend, but it's a wider gap than we saw with the 2024 Supergoose reissue, where originals traded at a 70 to 130% premium over that bike's $549.99 retail.
For context, the base 1987 Decade — a lower trim, not part of this reissue — shows a clean condition split across 6 comps this year: rough-to-fair examples at $320 to $350, good-condition examples at $1,000 to $1,200. Both Decade Pro comps landed above that good-condition range, which tracks — it was the higher-spec bike originally, and it's showing a wider gap now.
This is a thin dataset for a model this specific — two comps on the Decade Pro since the reissue. Treat the premium as one to watch, not a confirmed trend, until more sales close.
View model data →Market WatchMay 15, 2026
1986–88 GT Performers: three transactions in 30 days, all above mid
A cluster of recent eBay sales for the GT Performer shows the spring market firming up. The three transactions averaged $1,960 — all for good-to-excellent condition examples with original decals. Restored bikes with aftermarket components are clearing significantly below this. Condition premium is the story right now.
View model data →Notable SaleApril 28, 2026
1982 SE Racing PK Ripper closes at $4,150 — near the top of its historical range
A well-documented 1982 PK Ripper with matching original components and original decals cleared $4,150 on eBay. The listing included period photos and a known previous owner, which likely contributed to buyer confidence. Provenance documentation is showing a measurable impact on final prices for Tier 1 bikes.
View model data →AnalysisMarch 10, 2026
What the originality premium actually looks like in 2026 data
Across tracked models, bikes described as all original or survivor are averaging 38% above restored examples of the same model and year. That gap has widened compared to historical comps. Collectors are paying more for authenticity, and the supply of unrestored examples continues to shrink. For sellers, this argues strongly against restoration before sale.