Ring of False Life

I've seen items in the past that actually boost a character's hit point pool, and are replenished with a full night's rest. The ring of False Life seems to be a staple in DDO, though finding it in a hardback source has proved challenging. I have found a close equivalent in the form of Vest of False Life from Sword and Fist, so I will use this item as a base for the creation of a set of Ring's of False Life, which will be readily usable in my current campaign. Vest of False Life grants 10 hp, though not considered temporary, and requires the bear's endurance spell. The vest requires a CL 6 for creation, three higher than the minimum requirement of CL to cast either bear's endurance or false life. The base price is 12,000 gp. I will deviate slightly from this, in order to make a reasonable conversion from 3.0 to 3.5.

At CL 6, assuming that the variable 1d10 granted a value of 4, the result was exactly 10, thus granting the value posted on the item. By applying the empower spell feat, then the maximize spell feat, and finally both feats in item creation, I have come with an appropriate progression in bonuses granted by market price, for a series of Rings of False Life. Lastly I applied the intensify spell feat to create an epic version of the Ring of False Life, and of course was required to set the minimum Cl at 20th, though the actual spell level was only 9th. The series of items would appear as follows:

Ring of False Life: This ring is a pale thin band. It is usually made of ivory or some other kind of animal bone. The ring grants the wearer +5 hp, +10 hp, +15, hp, +20 hp, or +25 hp. When you take the ring off, you immediately lose the bonus hit points.
Moderate necromancy; CL 6th, Forge Ring, false life, creator's level must be at least 3/5 times the ring's bonus; Price 6,000 gp (+5), 24,000 gp (+10), 54,000 gp (+15), 96,000 gp (+20), 150,000 (+25).

Ring of Epic False Life: This ring is a pale thin band. It is usually made of ivory or some other kind of animal bone. The ring grants the wearer +30 hp, +35 hp, +40 hp, +45 hp, or +50 hp. When you take the ring off you immediately lose the bonus hit points.
Strong necromancy; CL 20th, Forge Epic Ring, false life, creator's level must be at least 3/5 times the ring's bonus; Price 2,160,000 gp (+30), 2,940,000 gp (+35), 3,840,000 gp (+40), 4,860,000 gp (+45), 6,000,000 gp (+50).