you will get better rate if you call them once you reach Nepal. the online rate is standard for "gaathwala aka maaldar" guests. also haggle the price a bit coz they lose money when noone is sleeping in the room. who knows, they might even include free food if you negotiate properly. first call their reservation directly and get a quote and then call other local travel agents and compare and save.

if they have multiple room types, book a cheap one and once you get to the front desk, ask them politely for a complimentary upgrade. if the front desk people cant do it, politely ask for a manager. remember, you dont lose nothing by asking!

on a different note,  Hotel Chautari isnt bad either and you may want to consider that option as well. there was another hotel in par with Chautari but I forgot the name.