William Optics Gran Turismo 81 IV Triplet APO f/5.9 + Reducer - USED (F81GTIVRD-U) price tracker
Best verified price
1 store compared · 1 fresh offer · last market update 4h ago
We score a price only against history we recorded ourselves. Until then this product shows its market range instead of a number we would be inventing.
You will be taken to astronomyplus.com. UponSale does not process payments and does not sell this product.
Market summary
UponSale currently tracks this product at 1 store. The lowest verified price among 1 fresh offer is $1,850.
Current prices for William Optics Gran Turismo 81 IV Triplet APO f/5.9 + Reducer - USED (F81GTIVRD-U)
1 store tracked| Store | Match | Item price | Shipping | Total | Stock | Freshness | Action |
|---|---|---|---|---|---|---|---|
| AstronomyplusBest verified astronomyplus.com | Used | $1,850 | unknown | $1,850 + ship | Unknown | Checked 4h ago | View offer |
Ranked by the lowest comparable price among offers that pass our freshness, variant and anomaly checks. Where a store does not publish a shipping cost we say so rather than assuming it is free. All amounts are the store’s own published prices at the time shown.
William Optics Gran Turismo 81 IV Triplet APO f/5.9 + Reducer - USED (F81GTIVRD-U) price history
Recorded by UponSalePrice history is just getting started
We began tracking this product recently. Current prices are already available above; the chart becomes useful as new observations arrive — we record one series point per day per store.
Price history for William Optics Gran Turismo 81 IV Triplet APO f/5.9 + Reducer - USED (F81GTIVRD-U) is just getting started, so there is not yet a range to describe.
Is William Optics Gran Turismo 81 IV Triplet APO f/5.9 + Reducer - USED (F81GTIVRD-U) a good deal today?
Buy now or wait?
not enough dataNot enough history yet
We need at least two weeks of observations from two or more stores before we will call a price good or bad.
This is a description of what we observed, not a prediction. We do not forecast future prices.
Market price snapshot
How this price compares
Telescope →Only one store we track sells this, so there is no second price to compare it against. What we can compare it to is the category: among the 190 telescope products we currently hold a price for, this one is dearer than 103 and cheaper than 86.
Category figures are computed from the prices we currently hold across every store we track, not from a manufacturer’s list. They move as the catalogue does.
Alternatives worth comparing
William Optics Gran Turismo 81 IV Triplet APO (A-F81GTIV) Red (A-F81GTIVRD)
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William Optics Gran Turismo 71 Triplet APO (w/ Optional 0.8x Flattener/Reducer) (A-F71GTII) Red (A-F71GTII-RD) / P-FLAT6AIII
William Optics GT 71 Triplet APO Telescope in Red - A-F71GTII-RD
William Optics Red Cat71 - RedCat 71 mm f/4.9 Refractor - T-C-71RD
William Optics Gran Turismo 81 APO w/ Internal Focus Design, Field Flattener & UniGuide
How UponSale tracks this product
Stores compared
Data provenance
- Stores
- 1 tracked
- Fresh offers
- 1
- Observations
- started today
- Last update
- 4h ago
- First tracked
- August 31, 2026
Every price above was read from a retailer’s own published data and stored with its timestamp. The history is ours, not a retailer’s claim.
How we calculate this
Where prices come from. We read the product data each retailer publishes on its own site, unhurriedly and within the rules that retailer sets. We never work around an access control and we never buy collected data of uncertain provenance.
What “verified” means. An offer can win best price only if it is inside our freshness window, matched to the exact variant, in stock, and free of an unresolved price anomaly. “Best verified price” means lowest among the fresh offers we track — not the lowest price on the internet.
How history works. Every price we observe is stored with its source and timestamp. Daily market low, median and high come from those observations, so the price history on this page is ours, not a retailer’s claim.
What we exclude. Stale offers, mismatched variants, bundles compared against single items, and prices that move implausibly without corroboration from another store.
Images. Product photographs come from the retailer they sit beside, loaded from their own image host. We do not re-host them and claim no rights in them.