This collects the existing source material suggested costs for magical items in an easy to read format. The author has made a few changes where suggested costs are completely absurd, but otherwise stuck to the suggestions offered in 5e D&D.
On the other hand, if you think the suggested costs are fundamendally flawed (and I do!), then although well formatted, this won't be much use. The main problem with suggested costs is that they are based entirely on rarity, not on how useful an item is. As an example, winged boots and a broom of flying - arguably the best items at their rarity level - has a suggested value of 500 and 450 gp, while the much less useful Boots of Levitation have a suggested value of 4,500 gp, Wings of Flying, $3,600 gp, and even a POTION of Flying has a suggested value of 2,500 gp!