I have 2 sets of HP PST 100 doubled up. Thet are sherwood tanks blue in color. There born on date is 88-89 and the other set is all 89. They have been setting around. They will pass hydro. I will take $300.00 a set as is. If you would like I can hyrdo them o2 clean them for $150.00 a set. If you get both sets and you want me to hyrdo them I will do both for $200.00. And if they flash after hyrdo I will tumble at no charge. If you want pics I can e-mail them to you.