Giving art as a gift can be a tricky business. If it’s hanging in a gallery, you may incur a heavy investment and a month-long wait. Furthermore, there really is no accounting for your recipient’s taste. While the right purchase can open a heart, the wrong one will surely furrow a brow, and you’re still out good money. Though undeniably less romantic, it tends to be wise to save big gallery buys for your own walls, and when it comes to gift-giving, take a calcul...