I've used the HP G4050 flatbed scanner for about 4 years. Best Buy sells them.
It's a great scanner and I've used it to scan family slides and photos. The mac software that comes with it is much better and easier to use than the windows software that I used to use with it before I got a mac.
Scanners don't change much over the years. Not on the same tech track as cell phones and laptops.
Any scanner from a well know company (HP, Canon, Epson) should serve you more than well.
The G4050 that I use cost me $195 and you'll see it advertised for any ware from $175 to $250... so shop around.
When you do get your scanner pick one photo and one slide and play with the settings to see what resolution and other settings work best for you. It will take a few tries to get the results the way you want. A good scanner can also restore faded color photos, remove scratches, etc. Some of the results are amazing.