If purchasing an authentic designer handbag is out of the question, consider buying a designer replica. Replicas are more likely to fit into an average person's budget, and they are usually pretty good imitations of the real thing. They come in a variety of levels of quality, and they can be found several ways.
Look online. There are several well-reputed online stores that sell these replicas at a decent price. Some are also good quality. The risk with purchasing handbags online is that they can't be seen in person, or touched.
Shop around for look-alikes in regular shops and department stores. Although these will not look exactly to the untrained eye like a designer bag, styles can be found that are pretty close. In the fashion world, designers set the trends, so once a line comes out, all other shops rush to sell pieces that look very similar. This may take time to shop around, but the prices will be good.
Buy knock-offs from the black market. These will probably be the closest to the actual designer bags, but be aware that the black market is barely legal, and it sometimes supports immoral practices such as child labor. These can be found easily in major cities.
Look for replica designer handbag dealers. They are often women who do it part time for extra income, selling to offices with a lot of women and offering in-home handbag parties much like Tupperware and candle parties. The prices will be good, and the dealer has often done the leg work of finding good quality handbags.