Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Puerto Escondido (50% of total searches to Oaxaca). The next most popular destinations are Oaxaca (25%) and Santa Maria Huatulco (13%). Searches for hotels in Zipolite (13%) are also popular.
KAYAK users have found double rooms in Oaxaca for as cheap as $137 (Oaxaca) in the last 3 days. The average price is $437.