Do my breasts appear saggy? (photos)

Based only on these two photos, your breast shape looks very reasonable to me. You may have a mild degree of ptosis, or sagging, but not significant sagging. Ultimately, however, it's YOUR opinion that matters most. If you're self-conscious about your breasts, you can attend one or two consultations with board-certified plastic surgeons to be examined in-person. They can then give you recommendations that may help you to decide whether it's worthwhile doing any procedures for your breasts. 

Dear Sunburst,    Thanks for submitting your pictures.   From observing your pictures, you appear to be B cup size with level 1-2 ptosis - mild to moderate.    It is obvious from your question, that you are troubled by your breasts shape. If the sagginess of your breasts is your only concern, than a mini lift  procedure (donut, Benelli) is all that is necessary to make your breasts perky with minimal scarring (only around the areola). If breasts size and cleavage are important to you too, than breasts implants will be very helpful to you. Full C cup size or small D cup size are natural and very attractive. If you need recommendation for specific implants size and type, please contact me.    You have to realize that not all results are the same, because experience skills and aesthetic eye are critical for good outcome. So, do your due diligence and choose wisely.   Always, consult with experienced board certified plastic surgeons who operate in accredited surgery center for your safety. Most importantly, check the before and after pictures in the photo gallery, to make sure that they are numerous, consistent and attractive with nice cleavage, peky, symmetrical and natural looking. Also, check the review on 'Realself' for ratings and positive experience reports.                                       Best of luck,                                                         Dr Widder