I am a resident of Lawrence Square Village and I have seen the prices of the units vary. The sale price of your home will depend on any upgrades you have and location. I would suggest that you select a Realtor and have them show you comps that are similar to your unit. You want to look at what has sold in the last 6 months and what is on the market now.
Long & Foster
Princeton Junction, New Jersey
The list price for similar homes in Lawrenceville Square Village with 2 bd, 21/2 ba is between $205,000 - $$250,000. The average sold homes is between $193,000 - $230,000. Looks like they are only staying on the market between 1-4 months.
25% down is the national average, have local agent give you a CMA. Also many condo developments are not on the HUD approved list so have to go conventional loan not FHA-problem! talk locally good luck!