Please comment grammatically mistake

Boss would like to sell our unit which we are occupying now. Actually it is sold already and will be released on 28th this month. So we need to relocate another unit.

The buyer come to our unit just one time, then he buy it. In fact, the renovations are new. We only occupied this unit for two years. The colour of the wall are painting in yellow. How sharp it is! The ground is PVC with green colour. The colour of venetian blinds are grey. We get sufficient lighting in our unit as there are many windows in "L" shape. We also has a pantry. The colour of the cabinets are simply white. You can't say it is beautiful but it is simple and clean enough. Next to the pantry, there is a smaller room. Heard that it is originally a toilet and the appearance is not good. Before occupying, we renovate it to a room. As a result, one more room can be used.

I think boss has a clever idea! First, he lead the buyer viewing our unit. Next, he lead the buyer to another unit which the renovation isn't new and a lot of sundry goods there, and there are two windows only. Of course, the appearance of the first unit is good.

To be honest, I am quite satisfying with my existing sit. But now, I need to say goodbye to it!