Hi arjohnperez,
Kung less than 1 year pa lang (under warranty pa) at kilala mo yung owner... plus, kung alam mong maganda pa ang condition niya... baka yung 575X nga and best option mo.
Unfortunately, hindi ako familiar sa prices dyan sa Pinas. Magkano ba ang brand new? Anyway, kung kilala mo nga yung owner at okay ang condition nung unit baka okay na rin ang asking price. Of course, it's always nice to get a discount but if it's already a good offer...
I think I sold my 575X for around 15K (rough conversion to pesos) but I can't be sure. Anyway, I bought it for around 22-25K (not very precise pero hindi ko masyado alam ang exchange rate).