5x100 to 5x114 adapters?

I've been casually browsing FB MP at night, kinda curious what wheels are out there.  The RPF-1s that came with the car (it had Sparco's before but he sold them) just aren't doing it for me.  I keep seeing wheels I like but they are almost always 5x114 pattern.

These adapters popped up last night, tonight I saw a few others.  I think they are various thicknesses.  I'm just curious about their ability to change the bolt pattern.  Worth it?  Run away?

https://www.facebook.com/marketplace/item/733628818985134

It works, I've run adaptors for years on various cars. Oddly my favorite wheels only came in 4/5x100 so I am always adapting them to 5x112/114.

In reply to chandler :

For $50 or so and fairly local, I'm willing to give them a try.

There are TONs of 5x100 wheels available. But I'm guessing you are trying to avoid buying new or reps? 

In reply to z31maniac :

New, yes.  But I'm exploring MP for specific examples first.  Sparco Terra, stuff that looks like STI BBS wheels, maybe someone with snows that sold the car they went to.  If I go new, I'll just go Tirerack.

I ran adaptors like that on my Quantum for many years.

Just mind that they will affect the total offset.  Those ones will remove 15mm of offset from a wheel - +40mm will now be +25mm for example.