To update this the 15% off code no longer works but TAKE10 works for 10% off.

Comply foam tips are currently BOGO and 15% off with code COMPLY15 https://www.complyfoam.com/store/ Makes it $12.74 plus tax for 6 pairs shipped, some $5 more.

So which of these is the better deal? Are Fidelios worth the $45 more?

It's possible it is only for new accounts.

Drop.com has $20 off $30 on anything in their "studio" section just for logging in. Instead of making an account you can just sign in with Facebook or Google. There are other items you can use it on but most cost much more making the discount less significant so these are the picks of the litter...

It's the same deal and code as in the post above yours.

20% of $50+ on everything sold by monoprice on eBay. https://ebay.com/usr/monoprice.com