One of the few speakers ive owned that I regret selling, I moved up the chain so to speak and moved on, but the 104\2 is a phenomenal sounding and built speaker.
The build quality is outstanding, some of the best fit and finish of any speaker ive personally owned, with the beautiful book matched veneer and heavy build quality.
As others will mention, check if they have the butyl or foam surrounds, and check the donut style dust covers on the woofers, as these along with the surrounds if foam, are quite the job to repair, as you pretty much have to disassemble the speaker to make these repairs, well worth the effort 104/2 are exceptional sounding speaker's.
Price depending on your area might be a tad high, but overall condition will determine that, in my area nice mint ones, average around 400 to 500.