I've never understood why a degassing valve would be thought necessary for storing coffee at home.
Neither have I. I use simple ziplocks to store my roasts, and I re-use them all the time. I go through a roast in a week, so I figure I do pretty well with the "low tech" method of pouring the fresh roast in the bag, squeezing as much air out as possible, letting it degas and expand the bag, and then pressing out as much of the air as possible every time I open and re-close it over the following week. Anyway, I've never had a freshness problem doing it this way.
So I assume, like you, that we are talking about gift enclosures here.