how to price a multi unit at the beach

[Andre Farah]

I have the occasion of purchasing a multi unit at the beach, it is 3 unit with 1 bedroom and 1 bath each and an "owner" apartment with 3-4 bedrooms on one level with water views.

the rentals are $ 650 x2 and 1 x $700.

on the owner unit I figured around $ 1500 per month ( September thru May ) and $ 1500/week from June 24th to August 30th.

based on the numbers given above I figured a starting bid of $395,000, does anybody agree with this starting bid?