The Logitech Precision PC Gaming Headset with Microphone has in line volume.
The Labtec GO 440 Adjustable Stereo PC Headset with Volume Control should fit the bill for you and it'sonly around 8.00.
The Plantronics brand of PC headsets seems to be the least expensive overall. In addition, the Plantronics GameCom 380, in particular, has many great reviews.
Motorola's website lists their entire line of Bluetooth headsets. Reviews of the headsets are found at CNet, PC Magazine, Android Central, and Consumer Reports.
The only mixamps I know of are attached to headsets or are headset accessories. This can be bought to use with any headset.
Most headsets now have a volume control built in, however I've only ever come across two USB headsets.
Radio Shack sells a in-line volume control for headsets.
USB headsets can be purchased from many stores such as PC stores, gaming stores, and also online. Online selling sites would be the best place for someone to purchase USB headsets for the best price.
PC headsets can work on the PS3, but compatibility may vary depending on the headset's design and connection type. Most headsets with a standard 3.5mm audio jack can be used with the PS3, as the console has a compatible audio output. However, USB headsets typically won’t work unless they are specifically designed for PS3 or have compatible drivers. Always check the headset specifications for compatibility before attempting to use them with a PS3.
Turtle Beach makes gaming headsets for most of the current generation systems on the market. This includes Playstation, Xbox, Nintendo, PC, and for mobile devices.
Sound resolution, volume, comfort.
Logitech makes some headsets with an easy-access volume and mute button control which would be perfect for you.
Some of the types of different headsets include the regular headsets which you have to plug in to the device in order to use them; another type of headsets available are the wireless headsets, which allows the user to use them wireless.
There are a number of detachable sepakers with seperate volume controls. It all depends on what brands you're specifically looking for.