I never owned an M14

When I was in Basic Training back in 19-(mumble) I was trained on the M14.

What's not to like?  Major Power cartridge, wooden stock, weighed about 80 pounds and sights were exceedingly sucky.   But it had ... options.  You could actually go full-auto with The Beast, although nobody ever did so except by accident.

So I'm not going to be able to add that to my collection of American Military Rifles.

Unfortunately, I've got another hole in my collection, which is the M16.

I never liked the M16 because of a lot of reasons:  I shot them in training, if only a few rounds, and it was impossible to keep it on target because of the light weight (unlike the M14).   A few years later, a friend of mine invited us to his 'ranch' and let us all try his *legal* M16.

Older and wiser I was, but unable to resist;  I discovered that the damn thing still pulled high-and-right with every shot and I still suffered from the CHS syndrome.

(CHS:   "Can't Hit SHIT!)

So as I've replaced the M14 with the M1 Garand, I need to replace the M16 with an M15.  Just for the synchronicity of it all, you understand.

Anyone know were I can pick one up for a reasonable (old retired guy living on Social Security and Popcorn Farts) price?

There was a time when I was in possession of 30+ magazines for the M15/M16, but I gave them away.   It's funny how one becomes generous when one has magazines and no rifle to run them.

Nope! No AR15's in Pennsylvania Deer Season!

Pennsylvania has decided that semi-automatic rifles (aka: AR15) are NOT legal for big game hunting.

Deer Hunters Relieved Over Semi-Automatic Weapons Law Change | WNEP.com:

On Tuesday, the Pennsylvania Game Commission made a last-minute change and decided not to legalize semi-automatic rifles for hunting big game like deer, black bear, elk, and turkey.

I agree with the Pennsylvania Game Commission.

The .556/223 is an underpowered caliber, deliberately designed for "war", where a wounded foe is better for the aggressor than a dead enemy ...  a wounded warrior hopes he has two buddies to get  him to medical help.

I've never been a fan of the .223 and its kin, because it is a wimpy  cartridge and over-touted; it is best suited for small game like woodchucks and prairie dogs

(ASIDE:  I own a .22-250 which is MUCH more effective even on small game, but much more powerful than the .223 cartridge.) 

MEAT:
I've hunted deer and antelope, and I'm a firm believer that a cartridge of at least .25 caliber is most likely to bring a quick and humane end to their life as fauna, and immediate transformation of their body into a locker.  Yummy!  (No .. Antelope does NOT "taste like goat"!)

I've served in Viet Nam, where wounded prisoners were brought in, and those were almost invariably 'wounded', not killed, by the 5.56mm/AR16 .. unless it was a "Head Shot".

Conclusion:
I agree with the Pennsylvania Game Commission that the 5.56mm/.223 caliber is not an appropriate (or at least a "controversial"  cartridge) for medium-size game such as deer.

Certainly, the .22* cartridge is not optimal for Elk, which are closer in size and vitality to a horse, than to a deer.

POSTSCRIPT:
Now, if the AR15 frame is presented with a more powerful cartridge than the .223/5,56 cartridge, I think that an overly broad definition of the term "AR15" is premature; that frame is capable of accepting more powerful cartridges (if only barely' the AR15 is not a "robust" frame, after all) and for the folks in charge in Pennsylvania to (apparently) have made such a broad statement is to accept that .
That's all I have to say about that.

On the other hand, I'm dumb as a stump and if you read down this far ... you already knew that.