carseats for grandparents car

[kileysmama]

So my in-laws are going to buy carseats for DD1 and 2 for their car. I don't think they'll be used often, so I don't want them to spend a ton, but I do want safe carseats. DD1 is 42 inches and over 35 lbs, but less than 40 lbs. DD2 is 20 months old, and around 25 lbs, not entirely sure how tall she is. DD3 is due in a week, but I don't anticipate them driving her anywhere for a few years, and if they do it would be with us or they could use our car. DD1 is curently FF in a Graco Nautilus and DD2 is in a Recaro proride RF.

Any suggestions for safe, but decently priced that will last them each at least a couple of years? My ILs have a Ford Escape if that makes a difference.

Thanks!