Practical route: define a very tight comparable set, verify current availability, separate completed sales from withdrawals, and note condition, financing and delivery terms. Then make an offer supported by those differences, with room for one counter. That is stronger than treating 113 days as...
Tenant turnover may be the hidden issue. A 4-bed has a narrower tenant pool than a smaller apartment, and each changeover can mean lost rent plus painting, repairs and leasing costs. Model one case where PEN 10,070 is achieved but the unit sits empty longer, and another where it leases promptly...