Questions about linkin park tickets

is there a certain limit to how many tickets can be bought? I keep receiving a sold out message on all options to buy tickets…I saw this website called ticketliquidator where they are selling a whole bunch of tickets…is these company buying all these tickets to resell them at a much higher price?? or is this website just having difficulties?

download safari or firefox and try that to get tickets. and the limit is 4. hope this helps!