Well, actually, kinda sorta, none of the above. What matters with a tuner is its ability to receive and discriminate stations. The parameters for tuner value are sensitivity, signal-to-noise ratio, separation, and alternate-channel rejection. A tuner does not provide amplification; you can't listen to it without an amplifier and speakers.
A "Receiver" commonly is a combination of an Amplifier, Pre-Amplifier/Control Section, and a Tuner into a single component. The stuff you'd want to look at would be Power (Watts-per-channel), Signal-to-Noise Ratio, number and type of inputs, and whether you want just 2-channel stereo or multi-channel Home Theater functionality. In the simple 2-Channel Stereo Receiver segment, many perfectly serviceable offerings are available from all major mass-market brands in the well-under-$200 range. As for Power, frankly, unless your aim is to irritate the neighbors and influence landlords, anything around 35 to 50 Watts per channel will provide plenty of volume for normal listening ... and a rule of thumb is that your speakers, in a stereo-only rig, should be of roughly equal cost to not more than twice as much as your receiver; IE, a $200 receiver most likely cannot exploit the advantages of a pair of speakers which cost significantly more than $4-500/pr, and will likely prove suitable with a pair of well designed speakers of around the $100-$150/pr cost range. You might be well advised to look at what are known as "Executive Shelf Systems", which include everything, even decent speakers, along with a cassette recorder and/or CD player. and many very good ones fall into the $200-$350 price range ... about what you would spend for a decent receiver and pair of speakers alone. For primarily radio and music in an office or small room environment, they can be ideal. I'd be glad to post some links to some, if you wish. Unless you know the seller and the equipment, or are buying from a reputable brick-and-mortar, really-there adio/video dealer, I'd avoid buying "Used" electronics if you aren't into troubleshooting and twiddling. New stuff also comes with manuals ... often handy for folks who care about such things.
Of course, if money is no object, I can recommend a nice $2500 Tuner, which would work well with any good $2500-3500.00 pre-amp and just about any old $6000-7500 2-channel 500 Watt Amplifier, driving a $7,500-10,000/pr set of speakers