From a business standpoint, the value of a record is first determined by the condition of the cover and the condition of the vinyl. The artist, label, and pressing are also very important. But if the record is wrecked, that’s the end of value. Warping, water damage and mold, along with breakage and excessive scratches – often caused by sliding the record in and out of the cover, without using the protective inner sleeve, will all cause a record to lose it’s value.
Vinyl records warp if exposed to heat, if they are leaning: crooked on a shelf or unsupported in a box, and even if they are stacked flat in a pile, over time. The ONLY way to store a record properly is straight up and down, on it’s edge.