For sentimental reasons, yes they are keepers. Tons of 10-10s were made and parts are relatively easy to find on eBay and even cheap parts saws on Craigslist. I have two 10-10s, a D-44 and a 200, but that is a small collection compared to others. There are several members here that are making aftermarket gasket kits and they are really good quality. Carb kits are also easy to get and some companies are making aftermarket parts too. Depending on the type of air filter, you may have one that is being made aftermarket, unfortunately the style I have are not made, so I will have to jimmy-rig something.
I am willing to bet your recoil is just dirty and needs a good cleaning. Years of use, dirt, sawdust and oil will gum up the spring. I have had a few saws like that and after taking the recoil apart and giving everything a good clean it will work as good as new! I would not be surprised if you get the recoil cleaned up and put some fresh mix fuel in it, it may start! Your saw looks to be in good shape with hardly any paint chipping...you don't see that much! When you get it running it will sound like an old hotrod when it idles, just sitting there going pop...pop...pop...pop...pop, really neat sounding.
Here is a link to a webpage that has Mac 10-10 IPLs. If you can find your serial number on the saw (usually under the air filter in the air box) then you should be able to find the correct IPL for your saw.
Old Saw Shop - Mac 10-10 IPLs
Here is an example of a cover on one:
View attachment 459588
The 3214 while not a classic can be rebuilt. Some of the members here can help track down a piston ring. One of the good things about the newer Macs is that other companies like Craftsman and Poulan manufactured the same saw (well a manufactured made the same saw for different companies), so it is not improbably to find a Craftsman, Poulan, Husqvarna or other brand parts that will work too. You will want to pull the muffler off and check and see if the piston is scored, if so you may need a piston (and possibly a cylinder too).
Here is a link to the 3214 IPL that gives you part numbers
Mymowerparts Website - Mac 3214 Chainsaw IPL