Here's my thought on some possibilities for this:
Ludwig Snare Drums:
Any 20s-30s era solid shell wood snares, especially in interesting colors. Figure on $650-$900 for the lacquer finish drums and up to a few thousand dollars if it is a rare color wrap such as rose marine, pea****, etc. Add more money if the hardware is artgold.
20s era heavy brass shell 8 or 10 lug 5x14 or 4x14, standard strainer for the 4x14 and standard, Super, or Super Sensitive for the 5x14. The standard strainer and Super strainer drums are highly sought after by jazz, classical, and many other artists. Figure anywhere from $500-$2000 depending on the model and the condition. Same shell as the black beauty and a lot less expensive since it is less ornate.
20s-30s black beauty SDs. Many different styles, sizes, engraving patterns. Figure on $1500 for a very rough drum up to several thousand for an extremely clean piece.
Circa 1940 solid shell 5x14 or 6.5x14 with Imperial lugs. Great drums. Figure $500-$1000
4x14 Downbeat SD from the 60s. Figure $350-$750 depending on color.
A really nice, clean WMP Jazz Festival from the 60s is always a nice drum to have. Figure $350-$475. Ditto for a nice Super Classic from the same era.
Drum Sets:
13/16/22 kits from the 60s are popular for rock and big band players. 50s era too. Figure $750-$900 depending on color and condition. Can't go wrong with WMP for big band guys, or silver sparkle in those sizes since that was Joe Morello's color. Champagne is good too. Also Black Diamond Pearl.
12/14/20 makes a nice jazz kit, but jazz players don't gravitate toward Ludwig in the same way that they do Gretsch. Figure on $850-$1000 depending on color and condition. Colors: WMP, champagne, BDP.
You don't have to spend a ton of money to have fun collecting, but, if you are collecting with the expectation of price appreciation you need to select carefully. For example, I used to know a fellow who would buy up tons of 8 lug Jazz Festivals thinking he'd make a killing on each one in a couple of years. I used to tell him not to do that. He'd have been be better off buying fewer drums, but buying more collectible ones. The reality is that the Jazz Fest snares were very common, so there are a lot of them still around. While some are clearly worth more than others (driven by color and condition), the reality is that common color Jazz Fest SDs in decent condition are worth about $300-$350 today, and in my opinion will not be worth significantly more than that any time soon just because they are fairly common. Rarity, originality, and overall condition will drive value, so if you were going to spend $2000 on vintage snares, I'd buy one or two rarer drums rather than 6 common ones. Most of all, be sure you have fun doing this. That's a key factor.
Steve
Hope this helps a bit.
Steve