The pool surface is fiberglass. Overall, the pool is fairly color blemish-free and smooth.
But I am seeing some heavy wear down to the fiberglass in several locations, especially on the steps. It is likely that the surface is between 15 to 30 years old. It might be closer to 20 to 25 years old, and if that’s the case it is nearing its expiration in the next one to 10 years or less. Heavier wear markings are found in the north corner where the tile meets the surface, and overall it is showing its age even though again it’s in relatively good shape overall for its age. If this surface is original, which in my opinion would be very impressive, it means it’s likely over 25 years old, and if that’s the case, it might be less than five years before resurfacing is maybe due.
The cost to re-fiberglass a pool such as this when that time comes is likely between 12 and 15,000 and up, or the typical replaster may cost between 10-12k as an alternative.

The waterline tile all appears to be original and in good condition overall.

The only areas of concern are inside the skimmer throat on the south east skimmer, and some minor modifications needed on the skimmer at the tile likely to be performed at the next resurfacing phase for less than $1000 total.

Calcium hardness levels are low and should be raised slightly less than $100 needed there.

The chlorine level is high, even though we have algae present, recommend service / treatments to help eliminate organics (less than $350 in chemical and service).

Main drain cover is due to be updated ($200) and at time of next rePlaster update the main drain itself = $1k+

The skimmer has some unusual markings on the throat near the basket on both in the same spot … recommend minor attn to confirm cause / if of issue ($25 or less).

On skimmer two, recommend a new skimmer lid, float O-ring, and likely a new float for good measure, along with the weighted basket.
On skimmer one, also recommend a new float ring, weighted basket, and lid.
Total parts installed: less than $500.

Working without issue. Recommend minor adjustments to wall adapter ($25 or less) to allow lower flow to unit (at 95% power).

Likely auto fill was removed ? Screws sealed lid. Seller told me there is no auto fill in here.

Elements are due for quarterly service ($150 or less).

The elements inside may be due for replacement ($300-500+) - can be confirmed once opened and serviced.

Also recommend pressure gauge ($50) due to age and condition.

Working. No visible issues seen. Just one audible one, small high pitched sound during start up. Otherwise ideal.

Working. Fairly Smooth 2/4. Sun damage but overall ideal for its age. Booster hoses should be updated soon - soft - $200 or less or more ideal hard plumbing ($500 or less).

This panel itself is likely original older than 30 years, and is showing its age.

It may be due to update the internals on this panel for less than $400 plus breakers to variable speed GFCI supported breakers for less than 300 + an electricians labor rate of $300