Oh, furniture. The little pieces of personal expression that fill up your space–ideally, a mixture of investment pieces (hello, always-expensive couches), and vintage finds. When you’re in college, or in your early twenties, nice furniture might not be in your budget, or even a priority. Décor shopping might even mean a quick trip to IKEA, or buying stuff off of your recently graduated friends. However, as you move through different stages of life, the quality of what you put into your home might become more important. To help you figure out when is the best time to invest in certain pieces of furniture, we turned to three design experts. Find all of their helpful advice below.