They will play fine if they have been stored properly, not exposed to high heat and heavy weight. I have many many albums I purchased new when I started collecting from 1969 to present that still sound fabulous and I am so happy I took good care of them.
If you are really serious about bringing out the best they have to offer I would suggest getting a cleaning machine (Nitty Gritty, VPI) and some good fluid (Record Research). This will allow you to really clean them and get the best sound from them possible. Also upgrading your playback system, if you haven't in all that time, will help considerably. Much has improved in vinyl playback equipment in tha last 20 years and the value has never been better. Plus you don't have to spend an arm and a leg to achieve complete vinyl playback satisfaction. These things will amaze you in terms of lack of surface noise, dynamic and frequency range. And here at agon you are welcomed into a brother-sister hood of devoted vinyl junkies. You are in good hands. I anticipate we are all envious of your collection.
If you are really serious about bringing out the best they have to offer I would suggest getting a cleaning machine (Nitty Gritty, VPI) and some good fluid (Record Research). This will allow you to really clean them and get the best sound from them possible. Also upgrading your playback system, if you haven't in all that time, will help considerably. Much has improved in vinyl playback equipment in tha last 20 years and the value has never been better. Plus you don't have to spend an arm and a leg to achieve complete vinyl playback satisfaction. These things will amaze you in terms of lack of surface noise, dynamic and frequency range. And here at agon you are welcomed into a brother-sister hood of devoted vinyl junkies. You are in good hands. I anticipate we are all envious of your collection.