Decent Earbuds on the Cheap


Anyone have suggestions on decent noise isolating earbud headphones under $100? Money is tight now so under $50 would be even better if there is such a thing.
As always....Thanks for your help.
griffinconst
I like the cheap models of the Sennheiser brand, I've been using them for years at work. They're really good. I need to buy a half dozen of them before they stop making them.
They used to be around $10,now there a little more, you could hunt around for better price. MX series. I think they all sound the same in that series too.
Best
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I personally use Bose SoundSport pulse wireless earbuds and i'm really happy about that. You can check all the buyer's review from here.  
They have an in-ear design that keeps the earbud secure in your head, without falling off. There are noise-isolating buds loops ingrained in your ear.