Not off the top of my head RA. It's a market for collectors. The value/worth/price of any piece of vinyl music will depend on the artist, the LP in question, its condition, its rarity or otherwise, any label or cover variations, original or reprint/reissue, any back story on it etc...... If you care to make a list of them by Artist, LP name, label and condition, I will give you an estimate of what you might get for them. Photos of the labels/sleeves would be a bonus as many have been issued on more than one label or different colours on the same label and/or with different sleeves.
Here is the grading system used on eBay:
Mt = Mint: Never been played or item still sealed. Cover and any extra items such as lyric sheet, booklet or poster (ie contents) are in perfect condition.
Mt- = Near Mint: In brand new condition with no surface marks or deterioration in sound quality. Cover and contents nearly perfect. (worth about 80 to 85% of the value of a mint)
Ex = Excellent: Shows some signs of being played but there is very little lessening in sound quality. Cover and contents might have slight wear and/or creasing. (worth about 70 to 75% of the value of a mint)
VG+ = Better than Very Good: Obviously been played but no significant deterioration in sound quality despite light surface marks. Very little wear and tear on cover and contents, without any major defects. (worth about 50% of the value of a mint)
VG = Very Good: Obviously been played many times but no major deterioration in sound quality despite noticeable surface marks and occasional light scratch. Normal wear and tear on cover or contents, without any major defects. (worth about 25% of the value of a mint)
Gd+ = Better than Good: Sound quality has deteriorated but with no distortion. Light scratches and occasional mild scratch. Cover and contents suffer from folding, scuffing of edges but not spine splits or discoloration. (worth about 10% of the value of a mint)
Gd = Good: Sound quality has noticably deteriorated, perhaps with some distortion. Mild scratches. Cover and contents suffer from folding, scuffing of edges, spine splits, discoloration etc.
Fair: Still just playable but has not been cared for properly and displays considerable surface noise - it may even jump. Cover and contents will be torn, stained and/or defaced. (worth about 5% of the value of a mint)
Poor: Will not play properly due to scratches, bad surface noise etc. Cover and contents will be badly damaged or partly missing. (worth about 5p)
If you want to check for yourself, go to Discogs.com and you will see which ones of yours are up for sale by others. You can select artist and/or title and then choose the right condition VG+ etc and see what they are going for on there. If there are a lot for sale of a particular LP then the value will be low as it obviously doesn't sell well. Or of course they are asking too much for it. If there is just one on there and it is a high figure then I would say that the asking price is way too high.
Andy..... The Jackie Day I got for 20 notes isn't on any of the few CDs I have.

