There are several great rebate (rabbit) planes out there. The older wooden skew blade types in good condition and well tuned are a delight to use for smaller projects.
For furniture fitting & joint tuning, an old Record 73 shoulder plane or a new Lie-Nielson 073 shoulder plane are without equal. Record and other UK manufacturers such as Ciifton and Preston now all out of production, made first class handplanes.
Older Stanley 45's and 55's were adjustable width rabbit and moulding cutter planes that work nicely once you learn how to fine tune them ( with patience and determination).
The old Stanley (and many other copycat American and foreign manufactures) cast iron duplex rabbit planes were much like the single cutter Stanley 190. They had lousy balance in your hand and many were made with casting flaws.
Long ago, when I first started buying old planes, most wooden planes could be had for $5 or less. One could buy a couple of file boxes full for $20 or so. With this kind of market, you can sustain acquiring some clinkers and not be out $$$.
In todays world, most sellers want north of $35 a piece, for broken junk and often more for something usable.
Test fit your hands around any plane under consideration. For older used planes, check for sole flatness, cutter remaining length and completeness of all the parts and in working order.
There are more worn out and unusable planes than good ones. But many millions have been made in the last 150 years. Take your time and find good ones that will still work.